Horobi, Death's Wail

Flying
Whenever a creature becomes the target of a spell or ability, destroy that creature.

Shirei, Shizo's Caretaker

Whenever a creature with power 1 or less is put into your graveyard from the battlefield, you may return that card to the battlefield at the beginning of the next end step if Shirei is still on the battlefield.

Deathgreeter

Whenever another creature dies, you may gain 1 life.

Death Cultist

Sacrifice this creature: Target player loses 1 life and you gain 1 life.

Typhoid Rats

Deathtouch (Any amount of damage this deals to a creature is enough to destroy it.)

Pulse Tracker

Whenever this creature attacks, each opponent loses 1 life.

Cabal Trainee

Sacrifice this creature: Target creature gets -2/-0 until end of turn.

Thoughtpicker Witch

{1}, Sacrifice a creature: Look at the top two cards of target opponent's library, then exile one of them.

Blood Pet

Gnat Miser

Each opponent's maximum hand size is reduced by one.

Bile Urchin

Sacrifice this creature: Target player loses 1 life.