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.
Ertai, the Corrupted
{2}{W}{U}{B}
Legendary Creature -- Phyrexian Human Wizard
3/4
{U}, {T}, Sacrifice a creature or enchantment: Counter target spell.