Fire Lord Sozin

Menace, firebending 3 (Whenever this creature attacks, add . This mana lasts until end of combat.)

Whenever Fire Lord Sozin deals combat damage to a player, you may pay . When you do, put any number of target creature cards with total mana value X or less from that player's graveyard onto the battlefield under your control.

(As this Saga enters and after your draw step, add a lore counter.)

I — Destroy all creatures.

II — Choose a card name. Search target opponent's graveyard, hand, and library for up to four cards with that name and exile them. Then that player shuffles.

III — Exile this Saga, then return it to the battlefield transformed under your control.