Creatures you control gain trample until end of turn. (Each of those creature can deal excess combat damage to the player or planeswalker it's attacking.) Draw a card.

Each legendary creature you control gets +1/+1 for each other legendary creature you control. {X}, {T}: Look at the top X cards of your library. You may reveal a legendary creature card from among them and put it into your hand. Put the rest on the bottom of your library in a random order.

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

Add {R} for each creature you control.

Add {B}{B}{B}.

Black spells you cast cost {1} less to cast.

{T}: Add {B} or {R}. {B/R}{B/R}{B/R}{B/R}, {T}, Sacrifice this artifact: Draw two cards.

Red spells you cast cost {1} less to cast.

Add {R}{R}{R}{R}{R}.

Attacking creatures you control have double strike.

Red creatures you control have first strike.

Whenever another creature you control enters, it gets +2/+0 and gains haste until end of turn. When Enduring Courage dies, if it was a creature, return it to the battlefield under its owner's control. It's an enchantment. (It's not a creature.)

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.) As this artifact enters, choose a creature type. Creatures you control of the chosen type get +2/+2.

Creatures you control have haste. Legendary creatures you control get +1/+0.

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.)

Take an extra turn after this one. At the beginning of that turn's end step, you lose the game.

Spree (Choose one or more additional costs.) + {2}{R} — Untap all creatures you control. If it's your combat phase, there is an additional combat phase after this phase. + {2} — Creatures you control get +1/+0 and gain first strike until end of turn. + {R} — Choose target opponent. Whenever a creature you control deals combat damage to that player this turn, create a tapped Treasure token.

Whenever you attack, if it's the first combat phase of the turn, untap all attacking creatures. They gain first strike until end of turn. After this phase, there is an additional combat phase. Choose a Background (You can have a Background as a second commander.)

Untap all creatures that attacked this turn. After this main phase, there is an additional combat phase followed by an additional main phase.

Destroy target artifact, creature, or planeswalker.

This spell costs {1} less to cast for each creature on the battlefield. Blasphemous Act deals 13 damage to each creature.

Destroy target creature. If a creature card is put into a graveyard this way, return it to the battlefield under your control. Sacrifice it at the beginning of your next end step.

Enchant creature Enchanted creature has "At the beginning of your upkeep, target opponent gains control of this creature unless you sacrifice a land."

Flying, menace Exterminate! — When this creature enters, destroy target creature an opponent controls. That player loses 3 life.

Destroy all creatures. They can't be regenerated.

Choose one — • Counter target spell if it's blue. • Destroy target permanent if it's blue.

Choose one — • Destroy target artifact. • Change the target of target spell or ability with a single target. • One or two target creatures can't block this turn.

As an additional cost to cast this spell, pay 3 life. Counter target creature spell.

The "legend rule" doesn't apply to permanents you control. Each legendary creature you control gets +1/+1. Each nontoken creature you control gets +1/+1 for each other creature you control with the same name as that creature.

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

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

This land enters tapped unless you control a Swamp or a Mountain. {T}: Add {B} or {R}.

This land enters tapped. Indestructible {T}: Add {B} or {R}.

({T}: Add {B} or {R}.) This land enters tapped.

{T}: Add {C}. {B/R}, {T}: Add {B}{B}, {B}{R}, or {R}{R}.

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

This land enters tapped. When this land enters, it deals 1 damage to target opponent. {T}: Add {B} or {R}.

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

{T}, Pay 1 life: Add {B} or {R}. {1}{B}{R}, {T}: Mount Doom deals 1 damage to each opponent. {5}{B}{R}, {T}, Sacrifice Mount Doom and a legendary artifact: Choose up to two creatures, then destroy the rest. Activate only as a sorcery.

({T}: Add {R}.)

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

This land enters tapped. {T}: Add {B} or {R}.

({T}: Add {B} or {R}.) This land enters tapped. When this land enters, surveil 1. (Look at the top card of your library. You may put it into your graveyard.)

This land enters tapped. {T}: Add {B} or {R}. {1}{B}{R}: Until end of turn, this land becomes a 2/3 black and red Insect creature with menace. It's still a land. Whenever this land attacks, you may discard a card. If you do, draw a card.

{1}, {T}: Add {B}{R}.

({T}: Add {B}.)

{T}: Add {C}. {T}: Add {B} or {R}. Activate only if you control a Swamp.

Nonlegendary artifact creatures you control have myriad. (Whenever a creature with myriad attacks, for each opponent other than defending player, you may create a token copy that's tapped and attacking that player or a planeswalker they control. Exile the tokens at end of combat.)

Menace Myriad (Whenever this creature attacks, for each opponent other than defending player, you may create a token copy that's tapped and attacking that player or a planeswalker they control. Exile the tokens at end of combat.)

Creature tokens you control have menace. Whenever you attack a player, choose target nontoken creature that's attacking that player. Create a token that's a copy of that creature, except it's 1/1. The token enters tapped and attacking that player. Sacrifice it at the beginning of the next end step.

Flying Whenever you create or sacrifice a token, each opponent loses 1 life.

Whenever you attack, each opponent loses X life and you gain X life, where X is the number of attacking creatures. If Mishra, Claimed by Gix and a creature named Phyrexian Dragon Engine are attacking, and you both own and control them, exile them, then meld them into Mishra, Lost to Phyrexia. It enters tapped and attacking.

Defender {T}: Creatures you control gain haste until end of turn.

Whenever a creature deals damage to you, destroy it.

Search your library for a card, put that card into your hand, then shuffle.

Search your library for a card, put that card into your hand, then shuffle. You lose 3 life.

Target opponent puts the cards from their hand on top of their library. Search that player's library for that many cards. The player puts those cards into their hand, then shuffles.

Spree (Choose one or more additional costs.) + {2} — Search your library for a card, then shuffle and put that card on top. + {B}{B} — Target player draws three cards and loses 3 life.