When you cast this spell, target opponent exiles the top half of their library, rounded up.
Ward — Sacrifice two permanents.
Ulamog enters with a number of +1/+1 counters on it equal to the greatest mana value among cards in exile.
Ulamog has annihilator X, where X is the number of +1/+1 counters on it.

Vigilance
Ward — Sacrifice a permanent with mana value 1 or greater.
: Create a 10/10 colorless Eldrazi creature token.

Prototype — 3/3
When this creature enters, if you cast it, untap target land you control. It becomes a Treefolk creature with haste and base power and toughness equal to this creature's power and toughness. It's still a land.

( can be paid with any two mana or with . This card's mana value is 10.)
Other Scarecrow creatures you control get +1/+1.
Whenever another Scarecrow you control enters, destroy target permanent.

Eminence — As long as The Ur-Dragon is in the command zone or on the battlefield, other Dragon spells you cast cost less to cast.
Flying
Whenever one or more Dragons you control attack, draw that many cards, then you may put a permanent card from your hand onto the battlefield.

Trample
This creature enters tapped and doesn't untap during your untap step.
At the beginning of your upkeep, you may sacrifice two Islands. If you do, untap this creature.
This creature can't attack unless you sacrifice two Islands. (This cost is paid as attackers are declared.)

Flying
Creatures can't attack you.

You gain 20 life.
Suspend 10 —

Flying
As Iona enters, choose a color.
Your opponents can't cast spells of the chosen color.

Flying
At the beginning of your upkeep, you may return target creature card from your graveyard to the battlefield.

Return all artifact, enchantment, and planeswalker cards from your graveyard to the battlefield.

Affinity for artifacts
Flying
When this creature enters, reveal the top three cards of your library. Put all artifact cards revealed this way into your hand and the rest into your graveyard.

Defender
When this creature enters, you may search your library for any number of cards that have mana value 9, reveal them, put them into your hand, then shuffle.
: This creature loses defender until end of turn.
Transmute

Exile target instant or sorcery card from a graveyard. Copy that card three times. You may cast the copies without paying their mana costs. Exile Mnemonic Deluge.

Delve
Target opponent mills nine cards, then you may cast an instant or sorcery spell from that player's graveyard without paying its mana cost. If that spell would be put into a graveyard, exile it instead.

This spell costs less to cast for each instant and sorcery card in your graveyard.
You have no maximum hand size.
At the beginning of your upkeep, put a knowledge counter on The Magic Mirror, then draw a card for each knowledge counter on The Magic Mirror.

Flying, trample
Whenever The Unspeakable deals combat damage to a player, you may return target Arcane card from your graveyard to your hand.

Whenever this creature attacks, sacrifice it unless you sacrifice an Island.

You may pay 6 life and sacrifice three black creatures rather than pay this spell's mana cost.
Flying, trample

Flying, first strike
, Reveal Infernal Spawn of Evil from your hand, Say "It's coming!": Infernal Spawn of Evil deals 1 damage to target opponent or planeswalker. Activate this ability only during your upkeep and only once each turn.

At the beginning of your upkeep, sacrifice Kuro unless you pay .
Pay 1 life: Target creature gets -1/-1 until end of turn.

Two target players exchange life totals. You create an X/X colorless Horror artifact creature token, where X is the difference between those players' life totals.

Flying, trample, haste, protection from black
Spirit of the Night has first strike as long as it's attacking.

Flying, lifelink
Ward — Sacrifice three nonland permanents.
If a card you didn't control would be put into an opponent's graveyard from anywhere, exile it instead.
During your turn, you may play cards exiled with Valgavoth. If you cast a spell this way, pay life equal to its mana value rather than pay its mana cost.

Affinity for artifacts
Flying, haste
Whenever Chiss-Goria attacks, exile the top five cards of your library. You may cast an artifact spell from among them this turn. If you do, it has affinity for artifacts.

Flying
, : This creature deals X damage to target creature. Spend only red mana on X.

Flying
When this creature enters, it deals damage to target creature equal to the number of Mountains you control.

Affinity for artifacts
Flying
When this creature enters, if you cast it from your hand, exile all artifacts.

Shichifukujin Dragon enters with seven +1/+1 counters on it.
, Remove two +1/+1 counters from Shichifukujin Dragon: Put three +1/+1 counters on Shichifukujin Dragon at the beginning of the next end step. Activate this ability only any time you could cast a sorcery.

Choose any number of target creatures, planeswalkers, and/or players. For each of them, exile the top card of your library, then Soulfire Eruption deals damage equal to that card's mana value to that permanent or player. You may play the exiled cards until the end of your next turn.