+2: Exile the top three cards of target opponent's library.
-X: Put a creature card with mana value X exiled with Ashiok, Nightmare Weaver onto the battlefield under your control. That creature is a Nightmare in addition to its other types.
-10: Exile all cards from all opponents' hands and graveyards.
L:
3
{1}
Bomat Courier
Artifact Creature - Construct
Haste
Whenever Bomat Courier attacks, exile the top card of your library face down. (You can't look at it.)
{R}, Discard your hand, Sacrifice Bomat Courier: Put all cards exiled with Bomat Courier into their owners' hands.
1 /
1
{U}
Delver of Secrets
Creature - Human Wizard
At the beginning of your upkeep, look at the top card of your library. You may reveal that card. If an instant or sorcery card is revealed this way, transform Delver of Secrets.
1 /
1
--
Insectile Aberration
Creature - Human Insect
Flying
1 /
1
{W}{W}
Kor Firewalker
Creature - Kor Soldier
Protection from red
Whenever a player casts a red spell, you may gain 1 life.
2 /
2
{2}
Smuggler's Copter
Artifact - Vehicle
Flying
Whenever Smuggler's Copter attacks or blocks, you may draw a card. If you do, discard a card.
Crew 1 (Tap any number of creatures you control with total power 1 or more: This Vehicle becomes an artifact creature until end of turn.)
3 /
3
{2}
Talisman of Progress
Artifact
{T}: Add {C}.
{T}: Add {W} or {U}. Talisman of Progress deals 1 damage to you.
{1}{U}
Aether Gust
Instant
Choose target spell or permanent that's red or green. Its owner puts it on the top or bottom of their library.
{S}
Arcum's Astrolabe
Snow Artifact
({S} can be paid with one mana from a snow source.)
When Arcum's Astrolabe enters the battlefield, draw a card.
{1}, {T}: Add one mana of any color.
{R}
Bloodfire Dwarf
Creature - Dwarf
{R}, Sacrifice Bloodfire Dwarf: It deals 1 damage to each creature without flying.
1 /
1
{1}{W}
Celestial Purge
Instant
Exile target black or red permanent.
{1}{U}
Censor
Instant
Counter target spell unless its controller pays {1}.
Cycling {U} ({U}, Discard this card: Draw a card.)
{W}
Condemn
Instant
Put target attacking creature on the bottom of its owner's library. Its controller gains life equal to its toughness.
{X}{U}
Condescend
Instant
Counter target spell unless its controller pays {X}. Scry 2. (Look at the top two cards of your library, then put any number of them on the bottom of your library and the rest on top in any order.)
{3}{R}
Cosmotronic Wave
Sorcery
Cosmotronic Wave deals 1 damage to each creature your opponents control. Creatures your opponents control can't block this turn.
{U}{U}
Counterbalance
Enchantment
Whenever an opponent casts a spell, you may reveal the top card of your library. If you do, counter that spell if it has the same mana value as the revealed card.
{U}{U}
Counterspell
Instant
Counter target spell.
{2}{B}
Crypt Rats
Creature - Rat
{X}: Crypt Rats deals X damage to each creature and each player. Spend only black mana on X.
1 /
1
{1}{U}
Daze
Instant
You may return an Island you control to its owner's hand rather than pay this spell's mana cost.
Counter target spell unless its controller pays {1}.
{R}
Electrickery
Instant
Electrickery deals 1 damage to target creature you don't control.
Overload {1}{R} (You may cast this spell for its overload cost. If you do, change "target" in its text to "each.")
{2}{U}
Fade Away
Sorcery
For each creature, its controller sacrifices a permanent unless they pay {1}.
{U/P}
Gitaxian Probe
Sorcery
({U/P} can be paid with either {U} or 2 life.)
Look at target player's hand.
Draw a card.
{U}{R}
Goblin Electromancer
Creature - Goblin Wizard
Instant and sorcery spells you cast cost {1} less to cast.
2 /
2
{W}{U}
Hindering Light
Instant
Counter target spell that targets you or a permanent you control.
Draw a card.
{R}
Inflame
Instant
Inflame deals 2 damage to each creature dealt damage this turn.
{W}
Mana Tithe
Instant
Counter target spell unless its controller pays {1}.
{U/P}
Mental Misstep
Instant
({U/P} can be paid with either {U} or 2 life.)
Counter target spell with mana value 1.
{1}{U}{U}
Narset, Parter of Veils
Legendary Planeswalker - Narset
Each opponent can't draw more than one card each turn.
-2: Look at the top four cards of your library. You may reveal a noncreature, nonland card from among them and put it into your hand. Put the rest on the bottom of your library in a random order.
L:
5
{1}{U}
Omen of the Sea
Enchantment
Flash
When Omen of the Sea enters, scry 2, then draw a card.
{2}{U}, Sacrifice Omen of the Sea: Scry 2.
{W}
Oust
Sorcery
Put target creature into its owner's library second from the top. Its controller gains 3 life.
{W}
Path to Exile
Instant
Exile target creature. Its controller may search their library for a basic land card, put that card onto the battlefield tapped, then shuffle.
{U}
Ponder
Sorcery
Look at the top three cards of your library, then put them back in any order. You may shuffle.
Draw a card.
{U}
Preordain
Sorcery
Scry 2, then draw a card. (To scry 2, look at the top two cards of your library, then put any number of them on the bottom and the rest on top in any order.)
{1}{U}
Remand
Instant
Counter target spell. If that spell is countered this way, put it into its owner's hand instead of into that player's graveyard.
Draw a card.
{G}
Sandstorm
Instant
Sandstorm deals 1 damage to each attacking creature.
{G}
Scattershot Archer
Creature - Elf Archer
{T}: Scattershot Archer deals 1 damage to each creature with flying.
1 /
2
{U}
Serum Visions
Sorcery
Draw a card. Scry 2.
{1}
Skullclamp
Artifact - Equipment
Equipped creature gets +1/-1.
Whenever equipped creature dies, draw two cards.
Equip {1}
{U}
Spell Pierce
Instant
Counter target noncreature spell unless its controller pays {2}.
{U}
Spell Snare
Instant
Counter target spell with mana value 2.
{2}
Sword of the Meek
Artifact - Equipment
Equipped creature gets +1/+2.
Equip {2}
Whenever a 1/1 creature enters under your control, you may return Sword of the Meek from your graveyard to the battlefield, then attach it to that creature.