Chainer's Edict

Target player sacrifices a creature of their choice.
Flashback {5}{B}{B} (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Ice Tunnel

({T}: Add {U} or {B}.)
This land enters tapped.

Snow-Covered Island

Woodland Chasm

({T}: Add {B} or {G}.)
This land enters tapped.

Snuff Out

If you control a Swamp, you may pay 4 life rather than pay this spell's mana cost.
Destroy target nonblack creature. It can't be regenerated.

Temporal Eddy

Put target creature or land on top of its owner's library.

Archaeomancer

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

Chittering Rats

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

Snow-Covered Forest

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.

Farseek

Search your library for a Plains, Island, Swamp, or Mountain card, put it onto the battlefield tapped, then shuffle.

Into the North

Search your library for a snow land card, put it onto the battlefield tapped, then shuffle.

Snow-Covered Swamp

Temporal Spring

Put target permanent on top of its owner's library.

Rimewood Falls

({T}: Add {G} or {U}.)
This land enters tapped.

Ghostly Flicker

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