mtg.wtf

Target creature gets +1/+1 and gains double strike until end of turn.

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

Uncharted Haven enters the battlefield tapped.
As Uncharted Haven enters the battlefield, choose a color.
{T}: Add one mana of the chosen color.

Target creature gets +4/+4 until end of turn. If it's a Spirit, it gains trample until end of turn.

As Unclaimed Territory enters the battlefield, choose a creature type.
{T}: Add {C}.
{T}: Add one mana of any color. Spend this mana only to cast a creature spell of the chosen type.

Prevent all damage that would be dealt to Uncle Istvan by creatures.

Flash
Enchant creature
Enchanted creature gets +2/+2 and attacks each combat if able.

Enchant nonbasic land
When enchanted land becomes tapped, destroy it.

Target creature gets +3/+3 and gains flying until end of turn.
Whenever a Zombie enters the battlefield under your control, you may pay {W}. If you do, return Unconventional Tactics from your graveyard to your hand.

Look at the top four cards of your library. You may reveal up to two instant and/or sorcery cards from among them and put the revealed cards into your hand. Put the rest on the bottom of your library in any order.

Toxic 1
When Unctus's Retrofitter enters the battlefield, up to one target artifact you control becomes an artifact creature with base power and toughness 4/4 for as long as Unctus's Retrofitter remains on the battlefield.

Other blue creatures you control have "Whenever this creature becomes tapped, draw a card, then discard a card."
Other artifact creatures you control get +1/+1.
{U/P}: Until end of turn, target creature you control becomes a blue artifact in addition to its other colors and types. Activate only as a sorcery.

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 Butler enters the battlefield, mill three cards.
When Undead Butler dies, you may exile it. When you do, return target creature card from your graveyard to your hand.

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

{1}{B}, Discard a card: Return Undead Gladiator from your graveyard to your hand. Activate only during your upkeep.
Cycling {1}{B}

{R}: Undead Leotau gets +1/-1 until end of turn.
Unearth {2}{B}

Zombie spells you cast cost {1} less to cast.
Zombie creatures you control get +2/+1.

When Undercity Eliminator enters the battlefield, you may sacrifice an artifact or creature. When you do, exile target creature an opponent controls.

{1}, Sacrifice a creature: Target player reveals cards from the top of their library until they reveal a land card, then puts those cards into their graveyard.

{1}, Sacrifice another creature: Put a +1/+1 counter on Undercity Necrolisk. It gains menace until end of turn. Activate only as a sorcery.

Target player loses 1 life, discards a card, then sacrifices a permanent.
Cipher

When Undercity Scavenger enters the battlefield, you may sacrifice another creature. If you do, put two +1/+1 counters on Undercity Scavenger, then scry 2.

{T}: Create a Treasure token. Activate only if a creature died this turn.

Undercity Sewers enters the battlefield tapped.
When Undercity Sewers enters the battlefield, surveil 1.