Clinging Mists

Prevent all combat damage that would be dealt this turn.
Fateful hour — If you have 5 or less life, tap all attacking creatures. Those creatures don’t untap during their controller’s next untap step.

Increasing Vengeance

Copy target instant or sorcery spell you control. If this spell was cast from a graveyard, copy that spell twice instead. You may choose new targets for the copies.
Flashback (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Inkwell Leviathan

Trample
Islandwalk (This creature can’t be blocked as long as defending player controls an Island.)
Shroud (This creature can’t be the target of spells or abilities.)

Think Twice

Draw a card.
Flashback (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Countersquall

Counter target noncreature spell. Its controller loses 2 life.

Chasm Drake

Flying
Whenever Chasm Drake attacks, target creature you control gains flying until end of turn.

Blighted Agent

Infect (This creature deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.)
Blighted Agent can’t be blocked.

Psychic Surgery

Whenever an opponent shuffles their library, you may look at the top two cards of that library. You may exile one of those cards. Then put the rest on top of that library in any order.

Conversion Chamber

, : Exile target artifact card from a graveyard. Put a charge counter on Conversion Chamber.
, , Remove a charge counter from Conversion Chamber: Create a 3/3 colorless Golem artifact creature token.

Sejiri Steppe

Sejiri Steppe enters the battlefield tapped.
When Sejiri Steppe enters the battlefield, target creature you control gains protection from the color of your choice until end of turn.
: Add .

Vivisection

As an additional cost to cast this spell, sacrifice a creature.
Draw three cards.

Kemba’s Legion

Vigilance
Kemba’s Legion can block an additional creature each combat for each Equipment attached to Kemba’s Legion.

Salvage Slasher

Salvage Slasher gets +1/+0 for each artifact card in your graveyard.

Thirst for Knowledge

Draw three cards. Then discard two cards unless you discard an artifact card.

Brood Birthing

If you control an Eldrazi Spawn, create three 0/1 colorless Eldrazi Spawn creature tokens. They have “Sacrifice this creature: Add .” Otherwise, create one of those tokens.

Hellion Eruption

Sacrifice all creatures you control, then create that many 4/4 red Hellion creature tokens.

Merfolk Observer

When Merfolk Observer enters the battlefield, look at the top card of target player’s library.

Sejiri Steppe

Sejiri Steppe enters the battlefield tapped.
When Sejiri Steppe enters the battlefield, target creature you control gains protection from the color of your choice until end of turn.
: Add .

Sejiri Merfolk

As long as you control a Plains, Sejiri Merfolk has first strike and lifelink. (Damage dealt by a creature with lifelink also causes its controller to gain that much life.)

Soul Stair Expedition

Landfall — Whenever a land enters the battlefield under your control, you may put a quest counter on Soul Stair Expedition.
Remove three quest counters from Soul Stair Expedition and sacrifice it: Return up to two target creature cards from your graveyard to your hand.

Lethargy Trap

If three or more creatures are attacking, you may pay rather than pay this spell’s mana cost.
Attacking creatures get -3/-0 until end of turn.

Elemental Appeal

Kicker (You may pay an additional as you cast this spell.)
Create a 7/1 red Elemental creature token with trample and haste. Exile it at the beginning of the next end step. If this spell was kicked, that creature gets +7/+0 until end of turn.