Memory Lapse

Counter target spell. If that spell is countered this way, put it on top of its owner's library instead of into that player's graveyard.

Mana Leak

Counter target spell unless its controller pays {3}.

Goblin Anarchomancer

Each spell you cast that's red or green costs {1} less to cast.

Spell Pierce

Counter target noncreature spell unless its controller pays {2}.

Goblin Electromancer

Instant and sorcery spells you cast cost {1} less to cast.

Murmuring Mystic

Whenever you cast an instant or sorcery spell, create a 1/1 blue Bird Illusion creature token with flying.

Wooded Ridgeline

({T}: Add {R} or {G}.)
Wooded Ridgeline enters tapped.

Reckless Impulse

Exile the top two cards of your library. Until the end of your next turn, you may play those cards.

Slime Against Humanity

Create a 0/0 green Ooze creature token with trample. Put X +1/+1 counters on it, where X is two plus the total number of cards you own in exile and in your graveyard that are Oozes or are named Slime Against Humanity.
A deck can have any number of cards named Slime Against Humanity.

Wrenn's Resolve

Tangled Islet

({T}: Add {G} or {U}.)
Tangled Islet enters tapped.

Island

Forest

Counterspell

Molten Tributary

({T}: Add {U} or {R}.)
Molten Tributary enters tapped.

Fling

As an additional cost to cast this spell, sacrifice a creature.
Fling deals damage equal to the sacrificed creature's power to any target.

Lórien Revealed

Draw three cards.
Islandcycling {1} ({1}, Discard this card: Search your library for an Island card, reveal it, put it into your hand, then shuffle.)