The Dawning Archaic (SOS 289)

Legendary Creature — Avatar • Mana cost: {10} • Secrets of Strixhaven • Mythic

This spell costs {1} less to cast for each instant and sorcery card in your graveyard.
Reach
Whenever The Dawning Archaic attacks, you may cast target instant or sorcery card from your graveyard without paying its mana cost. If that spell would be put into your graveyard, exile it instead.

Illustrated by Mintautas Šukys.