When Unity Spheres enters, create two 1/1 colorless Construct artifact creature tokens. Tap two untapped creatures you control: Add two mana of any one color.
If you would draw one or more cards, draw that many cards plus one instead. When Unleashed Mindboggler dies, return it to the battlefield (front face up).
“FIND YOUR MIND, LOSE THE TRUTH. FIND THE TRUTH . . .” —Archmagus Icharof, last words
{G/W}: If Unlikeliest Heroes doesn't have a +1/+1 counter on it, put a +1/+1 counter on it. {2}{G/W}{G/W}: If Unlikeliest Heroes has a +1/+1 counter on it and doesn't have vigilance, put two +1/+1 counters and a vigilance counter on it. {3}{G/W}{G/W}{G/W}: If Unlikeliest Heroes has vigilance and not indestructible, put four +1/+1 counters and an indestructible counter on it.
Gain control of target creature with power less than or equal to the number of different creature types among creatures you control.
“We met on a battlefield. Cliché, I know. His skills impressed me so much that after I killed him, I tracked down his spawn point and offered him a job.”
Return target creature card from your graveyard to the battlefield, then search target opponent's library for a creature card and put that card onto the battlefield under your control. Then that player shuffles.
Onlookers were sure it was the meddling of Phenax that brought them together, but Rhordon the Hoplite-Eater's change of heart and appetite was entirely genuine.
When Unmasker of Fate's Design enters, look at target player's hand. Choose a nonland card from it and exile that card with a puzzle counter on it. As long as that card has a puzzle counter on it, that player may pay {2} and 1 life at any time. If they do, return the exiled card to their hand.
Fate spirals in a hundred directions, waiting for the one that will be chosen.
Choose one — • Creatures you control become colorless Forest lands until end of turn. (They have “{T}: Add {G}” and lose all other types and abilities.) • Lands you control become 2/2 green creatures in addition to their other types and gain haste until end of turn.
Add X mana in any combination of colors, where X is the amount of mana spent to cast Unravel Shattered Worlds. Coalesce {7}(You may cast this from your graveyard for {7}. If you do, it enters as a Horror creature after it resolves. Exile it if it would leave the battlefield or not resolve.)
Choose one, then choose another for each card named Unrelenting in your graveyard. • Creatures get -1/-1 until end of turn. • Create a 2/2 blue Elemental creature token. • Each opponent loses 3 life and you gain 3 life. • Search your library for a card with mana value 4 or greater, reveal it, put it into your hand, then shuffle.
Vanishing 2 (This permanent enters with two time counters on it. At the beginning of your upkeep, remove a time counter from it. When the last is removed, sacrifice it.) {T}: Add {C}. When Unstable Footing is put into your graveyard from the battlefield, if it had no time counters on it, search your library for a basic land card, put it onto the battlefield, then shuffle.
Vanishing 5 (This creature enters with five time counters on it. At the beginning of your upkeep, remove a time counter from it. When the last is removed, sacrifice it.) {1}{R}, Remove a time counter from Unstable Magmaling: Flip a coin. If you win the flip, it deals 3 damage to any target.
Unstoppable Slaughter deals 1 damage to each creature and each player. Whenever a creature dealt damage by Unstoppable Slaughter this turn dies this turn, repeat that process.
Choose one, then choose another for each card named Unsuspecting in your graveyard. • You may return a permanent you control to its owner's hand. • You may put an artifact, creature, or land card with mana value 2 or less from your hand onto the battlefield. • Untap up to three target permanents. • You gain 4 life.
Whenever you cast a nongreen spell, creatures you control get +1/+1 until end of turn. Wanderlust — When Untethered Disciple enters, if you control four or more differently named lands, create two 1/1 Scout creature tokens that are all colors.