Force Spike

Counter target spell unless its controller pays {1}.

Mana Leak

Counter target spell unless its controller pays {3}.

Swamp

Displace

Exile up to two target creatures you control, then return those cards to the battlefield under their owner's control.

Spell Pierce

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

Painful Memories

Look at target opponent's hand and choose a card from it. Put that card on top of that player's library.

Lost Hours

Target player reveals their hand. You choose a nonland card from it. That player puts that card into their library third from the top.

Witch's Cottage

({T}: Add {B}.)
Witch's Cottage enters tapped unless you control three or more other Swamps.
When Witch's Cottage enters untapped, you may put target creature card from your graveyard on top of your library.

Ice Tunnel

({T}: Add {U} or {B}.)
Ice Tunnel enters tapped.

Ghostly Flicker

Exile two target artifacts, creatures, and/or lands you control, then return those cards to the battlefield under your control.

Counterspell

Apostle's Blessing

({W/P} can be paid with either {W} or 2 life.)
Target artifact or creature you control gains protection from artifacts or from the color of your choice until end of turn.

Sweep Away

Return target creature to its owner's hand. If that creature is attacking, you may put it on top of its owner's library instead.

Insectile Aberration

Delver of Secrets

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.

Delver of Secrets // Insectile Aberration

Archaeomancer

When Archaeomancer enters, return target instant or sorcery card from your graveyard to your hand.

Chittering Rats

When Chittering Rats enters, target opponent puts a card from their hand on top of their library.

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.

Gurmag Angler

Delve (Each card you exile from your graveyard while casting this spell pays for {1}.)