This spell costs {X} less to cast, where X is the total power of creatures you control. Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.)

Defender (This creature can't attack.) Pay 1 life: This creature gets +1/+1 until end of turn.

Menace When this creature enters, target opponent creates two 1/1 white Dog creature tokens. When this creature dies, each opponent loses 3 life. Disguise {1}{B}

Trample When this creature enters, target opponent creates two 3/3 green Centaur creature tokens with protection from black.

When this creature enters, target opponent creates four 1/1 blue Faerie creature tokens with flying. {G}: Regenerate this creature.

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.

Reach, trample Whenever another creature you control enters, put X +1/+1 counters on it, where X is its power. Plot {3}{G} (You may pay {3}{G} and exile this card from your hand. Cast it as a sorcery on a later turn without paying its mana cost. Plot only as a sorcery.)

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

Flying {T}: Add one mana of any color.

{T}: Add {B}. This creature deals 1 damage to you.

{T}: Add {G}.

{T}: Add {G}. Ferocious — {T}: Add {G}{G}{G}{G}. Activate only if you control a creature with power 4 or greater. Eternalize {2}{G}{G} ({2}{G}{G}, Exile this card from your graveyard: Create a token that's a copy of it, except it's a 4/4 black Zombie Snake Druid with no mana cost. Eternalize only as a sorcery.)

{T}: Add {G}.

Creature spells you cast with power 4 or greater cost {2} less to cast. Whenever Goreclaw attacks, each creature you control with power 4 or greater gets +1/+1 and gains trample until end of turn.

{T}: Add two mana in any combination of colors. Spend this mana only to cast creature spells or activate abilities of creature sources. Whenever you cast a creature spell with power 5 or greater, put a +1/+1 counter on Gwenna and untap it.

{T}: Add {G}.

Landfall — Whenever a land you control enters, add one mana of any color.

This creature can't attack or block unless a player has no cards in hand.

When this enchantment enters, draw a card, then you may put a land card from your hand onto the battlefield. If you put a Cave onto the battlefield this way, you gain 4 life. Lands you control enter untapped.

Whenever a land you control enters tapped, choose one — • Untap that land. • Tap target nonland permanent an opponent controls.

Landfall — Whenever a land you control enters, create a Food token or a Treasure token. (Food is an artifact with "{2}, {T}, Sacrifice this token: You gain 3 life." Treasure is an artifact with "{T}, Sacrifice this token: Add one mana of any color.")

Vigilance (Attacking doesn't cause this creature to tap.) When this creature enters, search your library for a basic land card, put it onto the battlefield tapped, then shuffle. This creature can't attack or block unless you control seven or more lands.

Reach Ulvenwald Hydra's power and toughness are each equal to the number of lands you control. When this creature enters, you may search your library for a land card, put it onto the battlefield tapped, then shuffle.

Trample (This creature can deal excess combat damage to the player or planeswalker it's attacking.) This creature enters with a +1/+1 counter on it. Landfall — Whenever a land you control enters, double the number of +1/+1 counters on this creature.

Kicker {4} (You may pay an additional {4} as you cast this spell.) Vanishing 2 (This creature enters with two time counters on it. At the beginning of your upkeep, remove a time counter from it. When the last is removed, sacrifice it.) If this creature was kicked, it enters with three additional time counters on it.

When this creature enters, you may return target card from your graveyard to your hand.

When Honest Rutstein enters, return target creature card from your graveyard to your hand. Creature spells you cast cost {1} less to cast.

Whenever another creature you control dies, you get an experience counter. At the beginning of your end step, choose target creature card in your graveyard. If that card's mana value is less than or equal to the number of experience counters you have, return it to the battlefield. Otherwise, put it into your hand.

Landfall — Whenever a land you control enters, you may have target player lose 3 life. If you do, put three +1/+1 counters on Ob Nixilis.

At the beginning of your upkeep, sacrifice a creature. When you sacrifice this creature, each opponent discards a card, you draw a card, and you gain 2 life.

Other creatures have "Whenever this creature attacks, you may have it fight Grothama, All-Devouring." When Grothama leaves the battlefield, each player draws cards equal to the amount of damage dealt to Grothama this turn by sources they controlled.

When this creature enters, add one mana of any color. Whenever another creature you control with power 4 or greater enters, draw a card. Plot {2}{G} (You may pay {2}{G} and exile this card from your hand. Cast it as a sorcery on a later turn without paying its mana cost. Plot only as a sorcery.)

Menace Whenever this creature attacks, defending player may have you draw a card. If they do, untap this creature and remove it from combat.

Whenever this creature attacks or blocks, sacrifice a creature.

Jarad gets +1/+1 for each creature card in your graveyard. {1}{B}{G}, Sacrifice another creature: Each opponent loses life equal to the sacrificed creature's power. Sacrifice a Swamp and a Forest: Return this card from your graveyard to your hand.

Cumulative upkeep—Sacrifice a creature. (At the beginning of your upkeep, put an age counter on this permanent, then sacrifice it unless you pay its upkeep cost for each age counter on it.)