mtg.wtf

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.

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

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

{T}: Add {C}.
{T}: Add one mana of any color. Spend this mana only to pay Un-costs.

Underground Mortuary enters the battlefield tapped.
When Underground Mortuary enters the battlefield, surveil 1.

{T}: Add {C}.
{T}: Add {U} or {B}. Underground River deals 1 damage to you.

Undergrowth Stadium enters the battlefield tapped unless you have two or more opponents.
{T}: Add {B} or {G}.

Counter target spell. Its controller loses 3 life.

Each nonland card in your graveyard has escape. The escape cost is equal to the card's mana cost plus exile three other cards from your graveyard.
At the beginning of the end step, sacrifice Underworld Breach.

Whenever an opponent draws a card, Underworld Dreams deals 1 damage to that player.

{T}: Add one mana of any color. During your next untap step, as you untap your permanents, return Undiscovered Paradise to its owner's hand.

Return two target creatures to their owners' hands.

Return target creature card with mana value 3 or less from your graveyard to the battlefield.
Cycling {2}

{T}: Add {C}.
{B}, {T}: Put target Zombie card from your graveyard on top of your library.

Unholy Heat deals 2 damage to target creature or planeswalker.
Delirium — Unholy Heat deals 6 damage instead if there are four or more card types among cards in your graveyard.

Enchant creature
Enchanted creature gets +2/+1.

{T}: Exile up to two target cards from a single graveyard.
Unlicensed Hearse's power and toughness are each equal to the number of cards exiled with it.
Crew 2

You may exile a black card from your hand rather than pay this spell's mana cost.
Target player reveals their hand. You choose a nonland card from it. That player discards that card.

At the beginning of each combat, double the power and toughness of each creature you control until end of turn.

Each opponent discards two cards.

Forestwalk
{1}{G}{G}: Target creature gains forestwalk until end of turn.

Enchant creature
Enchanted creature gets +3/+3.
At the beginning of the upkeep of enchanted creature's controller, put a -1/-1 counter on that creature.

Return target creature to its owner's hand.

Search your library for a basic land card, put that card onto the battlefield, then shuffle.