Hyetta, Maiden of Frenzy

Historic spells you cast cost {1} less to cast.

{t}: the next time one or more counters is removed
from a player the next historic spell you cast cost {x}
lest to cast, where X is the number of counters
removed.

"Become their lord. Take their torment, despair.
Their affliction. Every sin, every curse. And melt it
all away. As the Lord of Chaos"