Blood Aspirant
{1}{R}
Creature -- Satyr Berserker
1/1
Whenever you sacrifice a permanent, put a +1/+1 counter on ~this~.
{1}{R}, {T}, Sacrifice a creature or enchantment: ~this~ deals 1 damage to target creature. That creature can't block this turn.
Korvold, Fae-Cursed King
{2}{B}{R}{G}
Legendary Creature -- Dragon Noble
4/4
Flying
Whenever ~this~ enters or attacks, sacrifice another permanent.
Whenever you sacrifice a permanent, put a +1/+1 counter on ~this~ and draw a card.
Slaughter-Priest of Mogis
{B}{R}
Creature -- Minotaur Shaman
2/2
Whenever you sacrifice a permanent, ~this~ gets +2/+0 until end of turn.
{2}, Sacrifice another creature or an enchantment: ~this~ gains first strike until end of turn.