Tyvar Kell

Legendary Planeswalker — Tyvar

Elves you control have ": Add ."
+1: Put a +1/+1 counter on up to one target Elf. Untap it. It gains deathtouch until end of turn.
0: Create a 1/1 green Elf Warrior creature token.
?6: You get an emblem with "Whenever you cast an Elf spell, it gains haste until end of turn and you draw two cards."

Witch Engine

Creature — Horror (4/4)

Swampwalk (This creature can't be blocked as long as defending player controls a Swamp.)
: Add . Target opponent gains control of Witch Engine. (Activate only as an instant.)

Swamp // Swamp

(: Add .)

Swamp

(: Add .)

Cabal Ritual

Instant

Add .
Threshold — Add instead if seven or more cards are in your graveyard.

Culling the Weak

Instant

As an additional cost to cast this spell, sacrifice a creature.
Add .

Dark Ritual

Instant

Add .

Liturgy of Blood

Sorcery

Destroy target creature. Add .

Rain of Filth

Instant

Until end of turn, lands you control gain "Sacrifice this land: Add ."

Songs of the Damned

Instant

Add for each creature card in your graveyard.

Forest

Basic Land — Forest

(: Add .)

Island

Basic Land — Island

(: Add .)

Mountain

Basic Land — Mountain

(: Add .)

Plains

Basic Land — Plains

(: Add .)

Snow-Covered Forest

Basic Snow Land — Forest

(: Add .)

Snow-Covered Island

Basic Snow Land — Island

(: Add .)

Snow-Covered Mountain

Basic Snow Land — Mountain

(: Add .)

Snow-Covered Plains

Basic Snow Land — Plains

(: Add .)

Wastes

Basic Land

: Add .

Abandoned Outpost

Land

Abandoned Outpost enters the battlefield tapped.
: Add .
, Sacrifice Abandoned Outpost: Add one mana of any color.

Academy Ruins

Legendary Land

: Add .
, : Put target artifact card from your graveyard on top of your library.