(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.
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.
Cast the Saga as your commander to immediately wrath the board (Chapter I) and strip a key card from an opponent's entire game zone (Chapter II), then transform on Chapter III into Fire Lord Sozin, a menacing 6-mana threat that adds on attack and steals creatures out of the defending player's graveyard whenever it connects. You play a controlling, attrition-heavy black game: clear the table, disrupt, and grind value until Sozin closes by reanimating opposing dead creatures onto your side.
Built-in board wipe on the first chapter that hits the moment you commander it down
Targeted exile-based disruption (Chapter II) removes infinite-combo pieces, key tutors, or commanders from hand, library, and graveyard at once
Recurs naturally as a commander and as a Saga, giving repeatable wraths and value
Firebending makes the reanimation trigger far cheaper, snowballing creatures from opponents' graveyards
Menace makes Fire Lord Sozin hard to block and reliably connect for value
Six mana and a slow three-turn payoff before any combat impact
Self-wipes your own board with Chapter I, so it fights your own creature plans
Mono-black means weak interaction with artifacts and enchantments and no instant-speed answers in color
The reanimation trigger depends on opponents having dead creatures and on you connecting first
Vulnerable to graveyard hate that empties the targets you want to steal
On-color insurance that you can also use offensively, and reminds you graveyards matter to Sozin's steal.
Add fast mana and ramp like Dark Ritual, Sol Ring, and Cabal Coffers to deploy and re-cast the six-mana commander reliably, plus sacrifice outlets (Viscera Seer, Phyrexian Altar) to convert stolen creatures into value. Lean into reanimation payoffs (Animate Dead, Victimize) and graveyard-filling effects so Sozin always has targets, and include protection like Imp's Mischief or Heroic Intervention to push connects. For higher power, pivot toward a tutor-and-disrupt control shell using Demonic Tutor and Vampiric Tutor to find Chapter II answers and combo enablers.