Choose two target creature cards in your graveyard. Sacrifice a creature. If you do, return the chosen cards to the battlefield tapped.

This spell costs 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.)

, : You may tap or untap target artifact, creature, or land.

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Take an extra turn after this one.

Mutate (If you cast this spell for its mutate cost, put it over or under target non-Human creature you own. They mutate into the creature on top plus all abilities from under it.)
Flash
Flying
Whenever this creature mutates, destroy target creature or planeswalker an opponent controls.

Destroy all lands.

If you would flip a coin, instead flip two coins and ignore one.

Whenever a player sacrifices a permanent, this creature deals 1 damage to any target.

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Destroy all nonland permanents with mana value 1 or less.
Cycling (, Discard this card: Draw a card.)

Deathtouch
Darkness — Whenever Cecil deals damage, you lose that much life. Then if your life total is less than or equal to half your starting life total, untap Cecil and transform it.

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: Return Oboro to its owner's hand.

Counter target spell. If that spell is countered this way, put it into its owner's hand instead of into that player's graveyard.
Draw a card.

At the beginning of each end step, if an opponent lost 2 or more life this turn, you may put a quest counter on this enchantment. (Damage causes loss of life.)
Whenever a card is put into an opponent's graveyard from anywhere, if this enchantment has three or more quest counters on it, you may have that player lose 2 life. If you do, you gain 2 life.

Each opponent chooses fame or fortune. For each player who chose fame, gain control of a creature that player controls until end of turn. Untap those creatures and they gain haste until end of turn. For each player who chose fortune, you draw a card and create a Treasure token.

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Channel — , Discard this card: Mill three cards, then return a creature or planeswalker card from your graveyard to your hand. This ability costs less to activate for each legendary creature you control.

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

Enrage — Whenever this creature is dealt damage, create a token that's a copy of this creature.

: You may put a creature card from your hand onto the battlefield. That creature gains haste. Sacrifice the creature at the beginning of the next end step.