You may have Sakashima enter as a copy of another creature you control, except it has Sakashima's other abilities. The "legend rule" doesn't apply to permanents you control. Partner (You can have two commanders if both have partner.)

Landfall — Whenever a land you control enters, put a +1/+1 counter on target creature. {3}{G}{G}: Double the number of +1/+1 counters on each creature you control.

(Gain the next level as a sorcery to add its ability.) At the beginning of combat on your turn, put a +1/+1 counter on target creature you control. {G}: Level 2 Permanents you control with counters on them have ward {1}. {3}{G}: Level 3 If you would put one or more counters on a permanent or player, put twice that many of each of those kinds of counters on that permanent or player instead.

Whenever a creature you control leaves the battlefield, if it had counters on it, put those counters on The Ozolith. At the beginning of combat on your turn, if The Ozolith has counters on it, you may move all counters from The Ozolith onto target creature.

(This land isn't a spell, it's affected by summoning sickness, and it has "{T}: Add {G}.")

At the beginning of combat on your turn, you may have Johan gain "Johan can't attack" until end of combat. If you do, attacking doesn't cause creatures you control to tap this combat if Johan is untapped.

You may play an additional land on each of your turns. Landfall — Whenever a land you control enters, you may draw a card.

When Barrin enters, return up to one other target creature or planeswalker to its owner's hand. At the beginning of your end step, if a permanent was put into your hand from the battlefield this turn, draw a card.

Vigilance Whenever you cast a creature spell, draw a card, then you may put a land card from your hand onto the battlefield. {3}, {T}: Return target creature you control to its owner's hand.

When this enchantment enters, draw a card. Whenever a land an opponent controls enters, if that player had another land enter the battlefield under their control this turn, they return a land they control to its owner's hand.

Flash (You may cast this spell any time you could cast an instant.) At the beginning of each player's draw step, that player draws an additional card.

Draw cards equal to the number of cards in your library, then put a card from your hand on top of your library. You have no maximum hand size until your next turn.

You may play an additional land on each of your turns. Whenever you play a land or cast a spell, draw a card if you have no cards in hand. Otherwise, discard a card.

At the beginning of each player's draw step, that player draws two additional cards.

Whenever a player plays a land, that player draws a card.

At the beginning of each player's draw step, if this artifact is untapped, that player draws an additional card.

At the beginning of each player's draw step, that player draws an additional card.

{T}: Each player may draw a card, then each player who drew a card this way gains 1 life.

Flying Creatures you control have "Whenever this creature becomes the target of a spell or ability, reveal the top card of your library. If it's a land card, put it onto the battlefield. Otherwise, put it into your hand. This ability triggers only twice each turn."

First strike, hexproof Whenever Narset attacks, exile the top four cards of your library. Until end of turn, you may cast noncreature spells from among those cards without paying their mana costs.

When Omnath enters, it deals damage to any target equal to the number of Elementals you control. Landfall — Whenever a land you control enters, put a +1/+1 counter on target Elemental you control. If you control eight or more lands, draw a card.

Whenever an opponent casts a spell, you may draw a card unless that player pays {1}.

At the beginning of each end step, draw a card for each opponent who drew two or more cards this turn, then create a Treasure token for each opponent who had two or more lands enter the battlefield under their control this turn.

Landfall — Whenever a land you control enters, you gain 1 life and draw a card.

Landfall — Whenever a land you control enters, exile the top card of your library. You may play that card for as long as it remains exiled. At the beginning of your end step, if there are cards exiled with this enchantment, put them into their owner's graveyard, then this enchantment deals that much damage to each opponent.

Enchant creature you control When enchanted creature deals combat damage to a player, sacrifice it and attach this Aura to a creature you control. If you do, untap all creatures you control and after this phase, there is an additional combat phase.

If this creature hasn't been exerted this turn, you may exert it as it attacks. When you do, untap all other creatures you control and after this phase, there is an additional combat phase. (An exerted creature won't untap during your next untap step.)

Haste When this creature enters, creatures you control gain trample and get +X/+X until end of turn, where X is the number of creatures you control.

{T}: Add {C}. {1}{U}, {T}: Put target artifact card from your graveyard on top of your library.

This land enters tapped. When this land enters, return a land you control to its owner's hand. {T}: Add {W}{U}.

This land enters tapped. When this land enters, you gain 1 life. {T}: Add {G} or {W}.

This land enters tapped. When this land enters, return a land you control to its owner's hand. {T}: Add {R}{W}.

{T}: Add {G}. Channel — {1}{G}, Discard this card: Destroy target artifact, enchantment, or nonbasic land an opponent controls. That player may search their library for a land card with a basic land type, put it onto the battlefield, then shuffle. This ability costs {1} less to activate for each legendary creature you control.

Boseiju enters tapped. {T}, Pay 2 life: Add {C}. If that mana is spent on an instant or sorcery spell, that spell can't be countered.

This land enters tapped unless you have two or more opponents. {T}: Add {G} or {W}.

{T}: Add one mana of any color in your commander's color identity.

Dark Depths enters with ten ice counters on it. {3}: Remove an ice counter from Dark Depths. When Dark Depths has no ice counters on it, sacrifice it. If you do, create Marit Lage, a legendary 20/20 black Avatar creature token with flying and indestructible.

This land enters tapped unless you control two or more other lands. {T}: Add {W} or {U}.

This land enters tapped unless you control two or more other lands. {T}: Add {G} or {U}.

{T}: Add {W}. {W}, {T}: Prevent the next 2 damage that would be dealt to target legendary creature this turn.

{T}: Add {W}. Channel — {2}{W}, Discard this card: It deals 4 damage to target attacking or blocking creature. This ability costs {1} less to activate for each legendary creature you control.

{T}, Pay 1 life: Add {U} or {R}. {1}, {T}, Sacrifice this land: Draw a card.

{T}: Add {G} for each creature you control.

This land enters tapped. When this land enters, return a land you control to its owner's hand. {T}: Add {R}{G}.

This land enters tapped. When this land enters, return a land you control to its owner's hand. {T}: Add {C}{C}.

{T}, Pay 1 life: Add {G} or {W}. {1}, {T}, Sacrifice this land: Draw a card.

This land enters tapped. When this land enters, return a land you control to its owner's hand. {T}: Add {U}{R}.

({T}: Add {R}, {G}, or {W}.) This land enters tapped. Cycling {3} ({3}, Discard this card: Draw a card.)

{T}: Add {W}. {T}: Return target legendary creature to its owner's hand.

({T}: Add {G}, {U}, or {R}.) This land enters tapped. Cycling {3} ({3}, Discard this card: Draw a card.)

Hexproof This land enters tapped. When this land enters, sacrifice two lands. {T}: Add three mana of any one color.

{T}: Add {U}. {U}, {T}: Untap target legendary permanent.

{T}: Add {C}. {2}, {T}: Choose a color. Add an amount of mana of that color equal to your devotion to that color. (Your devotion to a color is the number of mana symbols of that color in the mana costs of permanents you control.)

{T}: Add {G}. {G}, {T}: Target legendary creature gets +1/+1 until end of turn.

{T}: Add {U}. Channel — {3}{U}, Discard this card: Return target artifact, creature, enchantment, or planeswalker to its owner's hand. This ability costs {1} less to activate for each legendary creature you control.

This land enters tapped unless you control two or more other lands. {T}: Add {G} or {W}.

({T}: Add {R} or {W}.)

({T}: Add {U}, {R}, or {W}.) This land enters tapped. Cycling {3} ({3}, Discard this card: Draw a card.)

This land enters tapped unless you have two or more opponents. {T}: Add {G} or {U}.

You have no maximum hand size. {T}: Add {C}.

This land enters tapped unless you control two or more other lands. {T}: Add {R} or {G}.

{T}: Add {C}. {4}, {T}: Target creature can't be blocked this turn.

This land enters tapped. When this land enters, you gain 1 life. {T}: Add {R} or {G}.

({T}: Add {G} or {W}.)

This land enters tapped unless you have two or more opponents. {T}: Add {W} or {U}.

This land enters tapped. When this land enters, return a land you control to its owner's hand. {T}: Add {G}{W}.

This land enters tapped unless you control a Forest. {T}: Add {G}. Delirium — {2}{G}{G}: This land becomes a copy of target permanent card in your graveyard until end of turn. Activate only if there are four or more card types among cards in your graveyard.

{T}: Add {R}. {R}, {T}: Target legendary creature gains first strike until end of turn.

This land enters tapped. When this land enters, return a land you control to its owner's hand. {T}: Add {G}{U}.

{T}: Add {R}. Channel — {3}{R}, Discard this card: Create two 1/1 colorless Spirit creature tokens. They gain haste until end of turn. This ability costs {1} less to activate for each legendary creature you control.

({T}: Add {G}, {W}, or {U}.) This land enters tapped. Cycling {3} ({3}, Discard this card: Draw a card.)

This land enters tapped unless you have two or more opponents. {T}: Add {R} or {W}.

This land enters tapped unless you have two or more opponents. {T}: Add {R} or {G}.

This land enters tapped unless you control two or more other lands. {T}: Add {U} or {R}.

{T}: Add {C}. {T}, Sacrifice this land: Destroy target land.

{T}, Pay 1 life: Add {R} or {W}. {1}, {T}, Sacrifice this land: Draw a card.

This land enters tapped unless you control two or more other lands. {T}: Add {R} or {W}.

This land enters tapped. When this land enters, you gain 1 life. {T}: Add {U} or {R}.

({T}: Add {R} or {G}.)

All creatures have "At the beginning of your upkeep, destroy this creature unless you pay {1}."

{T}: Add {C}. {2}, {T}: This land becomes a copy of target land, except it has this ability.

This land enters tapped. When this land enters, you gain 1 life. {T}: Add {G} or {U}.

This land enters tapped unless you have two or more opponents. {T}: Add {U} or {R}.

This land enters tapped. When this land enters, you gain 1 life. {T}: Add {W} or {U}.

({T}: Add {G} or {U}.)

({T}: Add {W} or {U}.)

You may have this land enter tapped as a copy of any land on the battlefield.

({T}: Add {U} or {R}.)

{T}: Add {C}. {T}, Sacrifice this land: Destroy target nonbasic land.

{T}, Pay 1 life: Add {G} or {U}. {1}, {T}, Sacrifice this land: Draw a card.

This land enters tapped. When this land enters, you gain 1 life. {T}: Add {R} or {W}.

{T}: Add {C}. {G}, {T}: Regenerate target creature.