mtg.wtf

Gain control of target creature until end of turn. Untap it. It gains trample and haste until end of turn.

Put a +1/+1 counter on each of up to two target creatures.
Flashback {1}{W}

{1}, Sacrifice Traveler's Amulet: Search your library for a basic land card, reveal it, put it into your hand, then shuffle.

When Treacherous Pit-Dweller enters the battlefield from a graveyard, target opponent gains control of it.
Undying

Defender
{T}: Exchange your life total with Tree of Redemption's toughness.

Whenever equipped creature attacks, defending player reveals cards from the top of their library until they reveal a land card. The creature gets +1/+0 until end of turn for each card revealed this way. That player puts the revealed cards into their graveyard.
Equip {2}

Target opponent sacrifices a creature. You gain life equal to that creature's toughness.

At the beginning of your upkeep, target opponent discards a card if you control the creature with the greatest power or tied for the greatest power.

At the beginning of your upkeep, draw a card if you control the creature with the greatest power or tied for the greatest power.

Soulbond
As long as Trusted Forcemage is paired with another creature, each of those creatures gets +1/+1.

Deathtouch

When Tyrant of Discord enters the battlefield, target opponent chooses a permanent they control at random and sacrifices it. If a nonland permanent is sacrificed this way, repeat this process.

Morbid — When Ulvenwald Bear enters the battlefield, if a creature died this turn, put two +1/+1 counters on target creature.

At the beginning of each upkeep, if no spells were cast last turn, transform Ulvenwald Mystics.

{G}: Regenerate Ulvenwald Primordials.
At the beginning of each upkeep, if a player cast two or more spells last turn, transform Ulvenwald Primordials.

{1}{G}, {T}: Target creature you control fights another target creature.

Unbreathing Horde enters the battlefield with a +1/+1 counter on it for each other Zombie you control and each Zombie card in your graveyard.
If Unbreathing Horde would be dealt damage, prevent that damage and remove a +1/+1 counter from it.

Return target creature card from your graveyard to the battlefield.
Flashback {3}{W}

Target creature gets +3/+0 and gains haste until end of turn.

If a Zombie you control would deal combat damage to a player, instead that player mills that many cards.
Whenever a creature card is put into an opponent's graveyard from their library, exile that card and create a 2/2 black Zombie creature token.

When Undead Executioner dies, you may have target creature get -2/-2 until end of turn.

Target creature gains undying until end of turn.

Unhallowed Cathar can't block.

Enchant creature
When enchanted creature dies, return that card to the battlefield under your control.

At the beginning of your end step, you lose 1 life.