Imprint — When Ugin's Labyrinth enters, you may exile a colorless card with mana value 7 or greater from your hand.

: Add . If a card is exiled with Ugin's Labyrinth, add instead.

: Return the exiled card to its owner's hand.

: Add .

Umara Skyfalls enters tapped.

: Add .

: Add . Spend this mana only to pay a disturb cost or cast an instant or sorcery spell.

Enchant land

Enchanted land has ": Add one mana of any color."

Sacrifice Unbridled Growth: Draw a card.

As Unclaimed Territory enters, choose a creature type.

: Add .

: Add one mana of any color. Spend this mana only to cast a creature spell of the chosen type.

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

: Add one mana of any color.

: Create a Treasure token. Activate only if a creature died this turn. (It's an artifact with ", Sacrifice this artifact: Add one mana of any color.")

Level up (: Put a level counter on this. Level up only as a sorcery.)

: Add .

LEVEL 1-7

: Add , , , or .

LEVEL 8+

: Add , , , or . Scry 1.

: Add .

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

: Add .

: Add or . Underground River deals 1 damage to you.

As an additional cost to cast this spell, you may pay .

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.

Vigilance

When Undermountain Adventurer enters, you take the initiative.

: Add . If you've completed a dungeon, add six instead.

As an additional cost to cast this spell, discard a card.

Draw two cards and create two Treasure tokens. (They're artifacts with ", Sacrifice this artifact: Add one mana of any color.")

Spree (Choose one or more additional costs.)

+ — Destroy target creature.

+ — Create a 1/1 red Mercenary creature token with ": Target creature you control gets +1/+0 until end of turn. Activate only as a sorcery."

: Add .

, : Put target Zombie card from your graveyard on top of your library.

: Add .

, : Add one mana of any color.

: Add .

: Target land you control becomes the basic land type of your choice until end of turn.

Untaidake, the Cloud Keeper enters tapped.

, Pay 2 life: Add . Spend this mana only to cast legendary spells.

First strike

Whenever you cast an instant or sorcery spell, Urabrask deals 1 damage to target opponent. Add .

: Exile Urabrask, then return it to the battlefield transformed under its owner's control. Activate only as a sorcery and only if you've cast three or more instant and/or sorcery spells this turn.

Enchant land

When Urban Utopia enters, draw a card.

Enchanted land has ": Add one mana of any color."

: Add , , or .

Kicker and/or (You may pay an additional and/or as you cast this spell.)

As Urborg Lhurgoyf enters, mill three cards for each time it was kicked.

Urborg Lhurgoyf's power is equal to the number of creature cards in your graveyard and its toughness is equal to that number plus 1.

Kicker (You may pay an additional as you cast this spell.)

: Regenerate Urborg Skeleton.

If Urborg Skeleton was kicked, it enters with a +1/+1 counter on it.

Each land is a Swamp in addition to its other land types.

: Add .

Read ahead (Choose a chapter and start with that many lore counters. Add one after your draw step. Skipped chapters don't trigger. Sacrifice after III.)

I — Scry 4, then you may reveal the top card of your library. If a planeswalker card is revealed this way, put it into your hand.

II — You may put a planeswalker card with mana value 6 or less from your hand onto the battlefield.

III — You may activate the loyalty abilities of planeswalkers you control twice this turn rather than only once.

Vigilance

, : Draw a card, then discard a card.

Whenever you discard one or more artifact cards, create a tapped Powerstone token. This ability triggers only once each turn. (The token is an artifact with ": Add . This mana can't be spent to cast a nonartifact spell.")

: Add .

, , Sacrifice Urza's Cave: Search your library for a land card, put it onto the battlefield tapped, then shuffle.

: Add .

: Add . Activate only once and only if you control an Urza's Mine, an Urza's Power-Plant, and an Urza's Tower.

, : Head to AskUrza.com and click Urza's Fun House.

: Add . If you control an Urza's Mine and an Urza's Tower, add instead.

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)

I — Urza's Saga gains ": Add ."

II — Urza's Saga gains ", : Create a 0/0 colorless Construct artifact creature token with ‘This creature gets +1/+1 for each artifact you control.'"

III — Search your library for an artifact card with mana cost or , put it onto the battlefield, then shuffle.

: Add .

Metalcraft — : Add for each Urza's land you control. Activate only if you control three or more artifacts.

Enchant Forest

As Utopia Sprawl enters, choose a color.

Whenever enchanted Forest is tapped for mana, its controller adds an additional one mana of the chosen color.

Enchant creature

Enchanted creature can't attack or block.

Enchanted creature has ": Add one mana of any color."

Valakut, the Molten Pinnacle enters tapped.

Whenever a Mountain you control enters, if you control at least five other Mountains, you may have Valakut, the Molten Pinnacle deal 3 damage to any target.

: Add .

Whenever a nontoken, non-Angel creature you control dies, return that card to the battlefield under its owner's control with a +1/+1 counter on it. It has flying and is an Angel in addition to its other types.

Value Town enters the battlefield tapped.

: Add or .

--

Take a Trip to . . .

Sorcery — Adventure

Draw two cards. This spell deals 2 damage to each opponent. (Then exile this card. You may play the land later from exile.)

Kicker (You may pay an additional as you cast this spell.)

Target creature gets +3/+0 until end of turn. If this spell was kicked, that creature gains lifelink until end of turn. (Damage dealt by the creature also causes its controller to gain that much life.)

Equipped creature gets +0/+3 and can block an additional creature each combat.

Equip (: Attach to target creature you control. Equip only as a sorcery.)

Kicker (You may pay an additional as you cast this spell.)

Search your library for up to two basic land cards, put them onto the battlefield tapped, then shuffle. If this spell was kicked, put two +1/+1 counters on each creature you control.

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)

I — Create a 1/1 white Human Soldier creature token and a Food token. (A Food token is an artifact with ", , Sacrifice this artifact: You gain 3 life.")

II, III — You may put an Aura or Equipment card from your hand or graveyard onto the battlefield. If an Equipment is put onto the battlefield this way, you may attach it to a creature you control.

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)

I, II — Tap up to one target creature and put a stun counter on it. You get (two energy counters).

III — Pay any amount of . If you paid one or more this way, shuffle your library, then exile that many cards from the top. You may play one of those cards without paying its mana cost.

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)

I — For each player, exile up to one other target enchantment or creature that player controls until Vault 13 leaves the battlefield.

II — You gain 2 life and scry 2.

III — Return two cards exiled with Vault 13 to the battlefield under their owners' control and put the rest on the bottom of their owners' libraries.

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)

I — Exile all creatures with power 4 or greater.

II, III — Put a +1/+1 counter on each creature you control.

(Transforms from Storm the Vault.)

: Add one mana of any color.

: Add for each artifact you control.

: Add .

, : Creatures you control gain deathtouch and lifelink until end of turn.

, , Exile a creature card from your graveyard: Create a Treasure token. (It's an artifact with ", Sacrifice this artifact: Add one mana of any color.")

: Add .

: Add or . Vec Townships doesn't untap during your next untap step.

Target creature gains shroud until end of turn and can't be blocked this turn. (A creature with shroud can't be the target of spells or abilities.)

Splice onto Arcane—Return a blue creature you control to its owner's hand. (As you cast an Arcane spell, you may reveal this card from your hand and pay its splice cost. If you do, add this card's effects to that spell.)