: Target unblocked attacking creature becomes blocked. Activate only during combat after blockers are declared. (This ability works on creatures that can't be blocked.)

When Treasure Hunter enters the battlefield, you may return target artifact card from your graveyard to your hand.

Whenever Tribune of Rot attacks, mill two cards. For each creature card milled this way, create a 1/1 green Saproling creature token.

Heroic — Whenever you cast a spell that targets Triton Fortune Hunter, draw a card.

Destroy all Islands.

(: Add or .)

: Target land becomes a Plains or an Island until end of turn.

Draw a card. You get (two energy counters).

Whenever a land enters the battlefield under an opponent's control, if that player had another land enter the battlefield under their control this turn, Tunnel Ignus deals 3 damage to that player.

Visit — Choose an opponent. They choose a creature they control, then you choose a creature you control. You may exile the chosen creatures. If you do, return them to the battlefield under their owners' control at the beginning of the next end step. Otherwise, the chosen creatures fight each other.

Lights — 3, 6

Choose a card name. Target player reveals cards from the top of their library until a card with that name is revealed. If it is, that player puts the rest of the revealed cards into their graveyard and puts the card with the chosen name on top of their library. Otherwise, the player shuffles.

Landfall — Whenever a land enters the battlefield under your control, Tunneling Geopede deals 1 damage to each opponent.

Tuvasa the Sunlit gets +1/+1 for each enchantment you control.

Whenever you cast your first enchantment spell each turn, draw a card.

Cast this spell only if you control two or more Doctors.

Take an extra turn after this one. Exile Twice Upon a Time.

When you cast this spell, exile two target permanents.

Indestructible

Whenever Ulamog, the Ceaseless Hunger attacks, defending player exiles the top twenty cards of their library.

2 — When this permanent dies, return target noncreature, nonland card from your graveyard to your hand.

4 — Whenever this creature deals combat damage to a player, that player mills twice that many cards.

2 — 2/3

3 — 7/2

Return target nonland permanent to its owner's hand. Surveil 1. (Look at the top card of your library. You may put it into your graveyard.)

Morph (You may cast this card face down as a 2/2 creature for . Turn it face up any time for its morph cost.)

Whenever Unblinking Bleb or another permanent is turned face up, you may scry 2. (Look at the top two cards of your library, then put any number of them on the bottom of your library and the rest on top in any order.)

Whenever you cast a permanent spell with a mana cost that contains , double the value of X.

Whenever you cast an instant or sorcery spell or activate an ability, if that spell's mana cost or that ability's activation cost contains , copy that spell or ability. You may choose new targets for the copy.

Return target creature card from your graveyard to the battlefield with a lifelink counter on it.

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.

Target player discards two cards.

Cycling (, Discard this card: Draw a card.)

Search your library for up to X creature cards with different names that each have mana value X, reveal them, put them into your hand, then shuffle.

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.

: Add one mana of the chosen color.

Nontoken creatures you control have riot. (They enter the battlefield with your choice of a +1/+1 counter or haste.)

If a creature you control with a +1/+1 counter on it would deal damage to a permanent or player, it deals double that damage instead.

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

Flash (You may cast this spell any time you could cast an instant.)

Enchant creature

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

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

Whenever a Zombie enters the battlefield under your control, you may pay . If you do, return Unconventional Tactics from your graveyard to your hand.

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.

: 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. ( can be paid with either or 2 life.)

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. (Put the top three cards of your library into your graveyard.)

When Undead Butler dies, you may exile it. When you do, return target creature card from your graveyard to your hand.

, Discard a card: Return Undead Gladiator from your graveyard to your hand. Activate only during your upkeep.

Cycling (, Discard this card: Draw a card.)

, : Exile target Skeleton, Vampire, or Zombie.

Whenever Undercellar Myconid enters the battlefield or dies, create a 1/1 green Saproling creature token.

: 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. (Forge, Lost Well)

Forge — Put two +1/+1 counters on target creature. (Trap, Arena)

Lost Well — Scry 2. (Arena, Stash)

Trap — Target player loses 5 life. (Archives)

Arena — Goad target creature. (Archives, Catacombs)

Stash — Create a Treasure token. (Catacombs)

Archives — Draw a card. (Throne of the Dead Three)

Catacombs — Create a 4/1 black Skeleton creature token with menace. (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.

, 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.

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

Cipher (Then you may exile this spell card encoded on a creature you control. Whenever that creature deals combat damage to a player, its controller may cast a copy of the encoded card without paying its mana cost.)

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.

(: Add or .)

Undercity Sewers enters the battlefield tapped.

When Undercity Sewers enters the battlefield, surveil 1. (Look at the top card of your library. You may put it into your graveyard.)

Renown 1 (When this creature deals combat damage to a player, if it isn't renowned, put a +1/+1 counter on it and it becomes renowned.)

: Regenerate Undercity Troll. (The next time this creature would be destroyed this turn, it isn't. Instead tap it, remove all damage from it, and remove it from combat.)

Creatures you control gain deathtouch until end of turn. Then target creature you control fights target creature you don't control. (Each deals damage equal to its power to the other.)

Whenever Undercover Butler attacks the player with the most life or tied for most life, it can't be blocked this turn.

You may have Undercover Operative enter the battlefield as a copy of any creature on the battlefield, except it enters with a shield counter on it if you control that creature. (If it would be dealt damage or destroyed, remove a shield counter from it instead.)

CARDNAME enters the battlefield with ten eyestalk counters on it.

If CARDNAME would be dealt damage, remove that many eyestalk counters from it instead. If you can't, sacrifice it.

Whenever CARDNAME attacks, reveal cards from the top of your library until you reveal an instant, sorcery, or enchantment card with converted mana cost less than the number of eyestalk counters on CARDNAME. You may cast it without paying its mana cost. Shuffle your library.

: Add .

, , Exile Underdark Rift: Roll a d10. Put target artifact, creature, or planeswalker into its owner's library just beneath the top X cards of that library, where X is the result. Activate only as a sorcery.

(: Add or .)

Underground Mortuary enters the battlefield tapped.

When Underground Mortuary enters the battlefield, surveil 1. (Look at the top card of your library. You may put it into your graveyard.)

(: Add or .)

If damage would be dealt to Undergrowth Champion while it has a +1/+1 counter on it, prevent that damage and remove a +1/+1 counter from Undergrowth Champion.

Landfall — Whenever a land enters the battlefield under your control, put a +1/+1 counter on Undergrowth Champion.