Modern Horizons 3 Commander

Devoid (This card has no color.) Kozilek's Return deals 2 damage to each creature. Whenever you cast an Eldrazi creature spell with mana value 7 or greater, you may exile this card from your graveyard. If you do, this card deals 5 damage to each creature.

If you control two or more other lands, this land enters tapped. T: Add G. XG: Until end of turn, this land becomes an X/X green Hydra creature. It's still a land. X can't be 0.

T: Add C. T, Sacrifice a creature: Add one mana of any color. X2, T, Sacrifice a Desert: Exile target creature card with mana value X from your graveyard. Create a token that's a copy of it, except it's a 4/4 black Zombie. Activate only as a sorcery.

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.)

Lhurgoyf's power is equal to the number of creature cards in all graveyards and its toughness is equal to that number plus 1.

Equipped creature has haste and shroud. (It can't be the target of spells or abilities.) Equip 0

Double strike, haste Whenever this creature attacks, you get EE (two energy counters), then you may pay eight E. If you pay, untap all creatures you control, and after this phase, there is an additional combat phase.

+1: Create a 2/2 black Zombie creature token. Mill two cards. −3: Return target creature card from your graveyard to the battlefield. That creature is a black Zombie in addition to its other colors and types. −7: Destroy all non-Zombie creatures.

T: Add C. T: Add B or G. This land deals 1 damage to you.

You get E (an energy counter), then you may pay one or more E. If you do, each creature you control with power equal to the amount of E paid this way gains indestructible until end of turn. Destroy all creatures.

This land enters tapped. T: Add G or U. 2GU: Until end of turn, this land becomes a 3/3 green and blue Elemental creature with hexproof. It's still a land.

This land enters tapped. When this land enters, it deals 1 damage to target opponent. T: Add G or U.

Destroy target nonland permanent and all other permanents with the same name as that permanent.

X, T: Untap X target lands.

If you tap a permanent for mana, it produces twice as much of that mana instead.

Choose a nonbasic land type. Each land you control of that type becomes a copy of target creature you control until end of turn and gains haste until end of turn. Flashback 4U (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Creatures you control are every creature type. The same is true for creature spells you control and creature cards you own that aren't on the battlefield. 3, T: Create a 2/2 blue Shapeshifter creature token with changeling. (It is every creature type.)

T: Add U. 2U: Put an hour counter on this artifact. At the beginning of each upkeep, put an hour counter on this artifact. When the twelfth hour counter is put on this artifact, shuffle your hand and graveyard into your library, then draw seven cards. Exile this artifact.

2: This artifact becomes a copy of target artifact, creature, enchantment, or land until end of turn.

Changeling (This card is every creature type.) As Morophon enters, choose a creature type. Spells of the chosen type you cast cost WUBRG less to cast. This effect reduces only the amount of colored mana you pay. Other creatures you control of the chosen type get +1/+1.

Mortivore's power and toughness are each equal to the number of creature cards in all graveyards. B: Regenerate this creature. (The next time this creature would be destroyed this turn, instead tap it, remove it from combat, and heal all damage on it.)

1, T: Add RG.

Devoid (This card has no color.) When you cast this spell, remove all counters from up to one target permanent or opponent. The next spell you cast this turn costs 1 less to cast for each counter removed this way. Deathtouch

When this creature enters, create four 1/1 colorless Myr artifact creature tokens. Whenever this creature attacks, you may tap X untapped Myr you control. If you do, this creature gets +X/+0 until end of turn and deals X damage to the player or planeswalker it's attacking.