Trample

Enchant player
Enchanted player can't gain life.
Whenever enchanted player is dealt damage, they lose half their life, rounded up.

Flying
Other Demons, Devils, Imps, and Tieflings you control get +1/+1 and have lifelink.
At the beginning of each end step, if a creature card was put into your graveyard from anywhere this turn, create a 1/1 red Devil creature token with "When this token dies, it deals 1 damage to any target."

When this creature enters, you may search your library for a creature card with mana value 6 or greater, reveal it, put it into your hand, then shuffle.

Flying

, Sacrifice this creature: Target player draws a card.

When this creature enters, destroy target creature an opponent controls.

Put a +1/+1 counter on target creature you control. It gains protection from the color of your choice until end of turn. (It can't be blocked, targeted, dealt damage, enchanted, or equipped by anything of that color.)

When this creature enters, you may sacrifice another permanent. If you do, create a 3/2 colorless Eldrazi Horror creature token.
Delirium — At the beginning of your upkeep, if there are four or more card types among cards in your graveyard, transform this creature.

: Add .
, : You get (three energy counters).
, Pay : Add three mana in any combination of colors.

Counter target spell that targets a player.

Target creature you control gains protection from the color of your choice until end of turn.
Draw a card.

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.)
Flying
Whenever this creature mutates, create a red artifact token named Feather with ", Sacrifice this token: Return target Phoenix card from your graveyard to the battlefield tapped."

Exile all creatures.

Draw two cards.

: 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.)
Swampcycling (, Discard this card: Search your library for a Swamp card, reveal it, put it into your hand, then shuffle.)

You draw three cards and you lose 3 life.

Draw three cards, then discard a card.

, : Add .

When this creature enters, you may discard a card. If you do, draw a card.
Unearth (: Return this card from your graveyard to the battlefield. It gains haste. Exile it at the beginning of the next end step or if it would leave the battlefield. Unearth only as a sorcery.)