Azdaki Alchemist

Whenever you cast an instant or sorcery spell
place an Alchemy counter on Azdaki Alchemist.
{t}{1}: Play an instant or sorcery that's converted
mana cost is equal to the total number of
Alchemy counters on Azdaki Alchemist.
The bright minds of the Azdaki learn in secrecy far
from civilization