Tahatra, Idol of Whispers

Indestructible, Flash
Ascendancy 4 (As you cast this creature you may
tap four blue or black permanents you control, they
don't untap during your untap step while Ramuntash
is on the battlefield. If you didn't, Ramuntash isn't a creature.)
Whenever you counter a spell an opponent controls, that player sacrifices a nonland permanent.