mtg.wtf

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

Flying
When Unclaimed Bird enters the battlefield, if you're on the Mirran team, choose any number of permanents, then remove from each a counter of each kind already there. If you're on the Phyrexian team, proliferate.

Choose target creature. If you're on the Mirran team, put a +1/+1 counter on that creature and it gains lifelink until end of turn. If you're on the Phyrexian team, put a -1/-1 counter on that creature and it gains deathtouch until end of turn.

If you're on the Mirran team, Unclaimed Cat has lifelink.
If you're on the Phyrexian team, Unclaimed Cat has Toxic 1. (Players dealt combat damage by this creature also get a poison counter.)

If you're on the Mirran team, this card costs {1} less to cast.
If you're on the Phyrexian team, the colored mana symbols in Unclaimed Tanadon's mana cost are Phyrexian mana. (You can pay them either with {G} or 2 life.)

Creatures your opponents control get -2/-0 until end of turn.
Draw a card.

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

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.

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

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

When Undead Servant enters, create a 2/2 black Zombie creature token for each card named Undead Servant in your graveyard.

When Undercellar Myconid enters or dies, create a 1/1 green Saproling creature token.
{T}: Add one mana of any color.

You can't enter this dungeon unless you "venture into Undercity."
Secret Entrance — Search your library for a basic land card, reveal it, put it into your hand, then shuffle. (Leads to: Forge, Lost Well)
Forge — Put two +1/+1 counters on target creature. (Leads to: Trap!, Arena)
Lost Well — Scry 2. (Leads to: Arena, Stash)
Trap! — Target player loses 5 life. (Leads to: Archives)
Arena — Goad target creature. (Leads to: Archives, Catacombs)
Stash — Create a Treasure token. (Leads to: Catacombs)
Archives — Draw a card. (Leads to: Throne of the Dead Three)
Catacombs — Create a 4/1 black Skeleton creature token with menace. (Leads to: Throne of the Dead Three)
Throne of the Dead Three — Reveal the top ten cards of your library. Put a creature card from among them onto the battlefield with three +1/+1 counters on it. It gains hexproof until your next turn. Then shuffle.

Whenever a creature deals combat damage to a player, its controller may draw a card.
Whenever chaos ensues, you have no maximum hand size for the rest of the game.

When Undercity Scavenger enters, 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.

Creatures you control gain deathtouch until end of turn. Then target creature you control fights target creature you don't control.

Target opponent sacrifices a creature. If you control a creature with power 4 or greater, you gain 4 life.

Whenever Undercover Crocodelf deals combat damage to a player, investigate.
Disguise {3}{G/U}{G/U}

Deathtouch

Menace
When Underdark Explorer enters, you take the initiative.

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

As an additional cost to cast this spell, you may pay {2}{R}.
Prevent all combat damage that would be dealt this turn. If this spell's additional cost was paid, this effect doesn't affect combat damage that would be dealt by red creatures.

Undergrowth Scavenger enters with a number of +1/+1 counters on it equal to the number of creature cards in all graveyards.