Canyon Vaulter

Whenever this creature saddles a Mount or crews a Vehicle during your main phase, that Mount or Vehicle gains flying until end of turn.

Pactdoll Terror

Whenever this creature or another artifact you control enters, each opponent loses 1 life and you gain 1 life.

Stab Wound

Enchant creature
Enchanted creature gets -2/-2.
At the beginning of the upkeep of enchanted creature’s controller, that player loses 2 life.

Blood Scrivener

If you would draw a card while you have no cards in hand, instead you draw two cards and you lose 1 life.

Shriekwood Devourer

Trample
Whenever you attack with one or more creatures, untap up to X lands, where X is the greatest power among those creatures.

Blood Seeker

Whenever a creature an opponent controls enters, you may have that player lose 1 life.

Beast Within

Destroy target permanent. Its controller creates a 3/3 green Beast creature token.

Arcane Signet

: Add one mana of any color in your commander’s color identity.

Shriekwood Devourer

Trample
Whenever you attack with one or more creatures, untap up to X lands, where X is the greatest power among those creatures.

Sanguine Soothsayer

Flying, lifelink
Whenever Sanguine Soothsayer attacks, conjure a card named Sanguine Bond into the top fifteen cards of your library at random. It perpetually gains “You may pay rather than pay this spell’s mana cost” and “When this permanent enters, draw a card.”

Leaf-Leap Guide

Vigilance
Whenever another creature you control enters, Leaf-Leap Guide and that creature perpetually get +1/+1.
, : Return another target creature you control to its owner’s hand.

Infested Thrinax

Flash
When Infested Thrinax enters, until end of turn, whenever a nontoken creature you control dies, create a number of 1/1 green Saproling creature tokens equal to that creature’s power.

Wurmcoil Larva

Deathtouch, lifelink
When Wurmcoil Larva dies, create a 1/2 black Phyrexian Wurm artifact creature token with deathtouch and a 2/1 black Phyrexian Wurm artifact creature token with lifelink.

Grim Servant

Menace
When Grim Servant enters, search your library for a card with mana value less than or equal to your devotion to black, reveal it, put it into your hand, then shuffle. You lose 3 life. (Each in the mana costs of permanents you control counts toward your devotion to black.)

Grim Servant

Menace
When Grim Servant enters, search your library for a card with mana value less than or equal to your devotion to black, reveal it, put it into your hand, then shuffle. You lose 3 life. (Each in the mana costs of permanents you control counts toward your devotion to black.)

Infested Thrinax

Flash
When Infested Thrinax enters, until end of turn, whenever a nontoken creature you control dies, create a number of 1/1 green Saproling creature tokens equal to that creature’s power.

Teysa of the Ghost Council

Starting intensity 0
When Teysa enters, create a 1/1 white and black Spirit creature token with flying. Teysa intensifies by 1.
Spirits you control get +X/+0, where X is Teysa’s intensity.
At the beginning of your end step, you may exile Teysa. If you do, at the beginning of your next upkeep, return Teysa to the battlefield under its owner’s control and it gains haste.

Stop Cold

Flash
Enchant artifact or creature
When Stop Cold enters, tap enchanted permanent.
Enchanted permanent loses all abilities and doesn’t untap during its controller’s untap step.

Worldwalker Helm

If you would create one or more artifact tokens, instead create those tokens plus an additional Map token. (It’s an artifact with “, , Sacrifice this artifact: Target creature you control explores. Activate only as a sorcery.”)
, : Create a token that’s a copy of target artifact token you control.

Territory Forge

When Territory Forge enters, if you cast it, exile target artifact or land.
Territory Forge has all activated abilities of the exiled card.

Transmutation Font

: Create your choice of a Blood token, a Clue token, or a Food token.
, , Sacrifice three artifact tokens with different names: Search your library for an artifact card, put it onto the battlefield, then shuffle. Activate only as a sorcery.