Urabrask

First strike Whenever you cast an instant or sorcery spell, Urabrask deals 1 damage to target opponent. Add {R}. {R}: Exile Urabrask, then return it to the battlefield transformed under its owner's control. Activate only as a sorcery and only if you've cast three or more instant and/or sorcery spells this turn.

(As this Saga enters and after your draw step, add a lore counter.) I — This Saga deals 3 damage to target opponent and each creature they control. II — Create three Treasure tokens. III — Until end of turn, you may cast instant and sorcery spells from any graveyard. If a spell cast this way would be put into a graveyard, exile it instead. Exile this Saga, then return it to the battlefield (front face up).