Jace, Architect of Thought

+1: Until your next turn, whenever a creature an opponent controls attacks, it gets -1/-0 until end of turn.
−2: Reveal the top three cards of your library. An opponent separates those cards into two piles. Put one pile into your hand and the other on the bottom of your library in any order.
−8: For each player, search that player’s library for a nonland card and exile it, then that player shuffles their library. You may cast those cards without paying their mana costs.

Cold-Eyed Selkie

Islandwalk (This creature can’t be blocked as long as defending player controls an Island.)
Whenever Cold-Eyed Selkie deals combat damage to a player, you may draw that many cards.

Rupture Spire

Rupture Spire enters the battlefield tapped.
When Rupture Spire enters the battlefield, sacrifice it unless you pay .
: Add one mana of any color.

Kiora, Behemoth Beckoner

Whenever a creature with power 4 or greater enters the battlefield under your control, draw a card.
−1: Untap target permanent.

Idyllic Tutor

Search your library for an enchantment card, reveal it, put it into your hand, then shuffle your library.

Idyllic Tutor

Search your library for an enchantment card, reveal it, put it into your hand, then shuffle your library.

Idyllic Tutor

Search your library for an enchantment card, reveal it, put it into your hand, then shuffle your library.

Idyllic Tutor

Search your library for an enchantment card, reveal it, put it into your hand, then shuffle your library.

Akoum Hellkite

Flying
Landfall — Whenever a land enters the battlefield under your control, Akoum Hellkite deals 1 damage to any target. If that land is a Mountain, Akoum Hellkite deals 2 damage instead.

Benthic Giant

Hexproof (This creature can’t be the target of spells or abilities your opponents control.)

Sparkmage Apprentice

When Sparkmage Apprentice enters the battlefield, it deals 1 damage to any target.

Rally the Peasants

Creatures you control get +2/+0 until end of turn.
Flashback (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Dragon Broodmother

Flying
At the beginning of each upkeep, create a 1/1 red and green Dragon creature token with flying and devour 2. (As the token enters the battlefield, you may sacrifice any number of creatures. It enters the battlefield with twice that many +1/+1 counters on it.)

Enlightened Maniac

When Enlightened Maniac enters the battlefield, create a 3/2 colorless Eldrazi Horror creature token.

Turn Aside

Counter target spell that targets a permanent you control.

Balustrade Spy

Flying
When Balustrade Spy enters the battlefield, target player reveals cards from the top of their library until they reveal a land card, then puts those cards into their graveyard.

Myr Sire

When Myr Sire dies, create a 1/1 colorless Myr artifact creature token.

Larger Than Life

Target creature gets +4/+4 and gains trample until end of turn.

Goblin Assault

At the beginning of your upkeep, create a 1/1 red Goblin creature token with haste.
Goblin creatures attack each combat if able.

Become Immense

Delve (Each card you exile from your graveyard while casting this spell pays for .)
Target creature gets +6/+6 until end of turn.

Fog

Prevent all combat damage that would be dealt this turn.

Temur Battle Rage

Target creature gains double strike until end of turn. (It deals both first-strike and regular combat damage.)
Ferocious — That creature also gains trample until end of turn if you control a creature with power 4 or greater.

Emrakul’s Hatcher

When Emrakul’s Hatcher enters the battlefield, create three 0/1 colorless Eldrazi Spawn creature tokens. They have “Sacrifice this creature: Add .”