
Trample, firebending 4, haste
If you would lose unspent mana, that mana becomes red instead.
Ozai has flying and indestructible as long as you have six or more unspent mana.
Ramp into Ozai on turn 5-6, swing with his haste, and let firebending 4 plus the rule that unspent mana becomes red turn each combat into a mountain of you can dump into X spells, burn, and reanimation. Hold 6+ unspent mana to make him a flying, indestructible 6-power trampler that's nearly impossible to block or kill, then convert that mana flood into a lethal turn.
Add fast mana and rituals (Dockside Extortionist, Jeska's Will, Mana Geyser, Ancient Tomb) to consistently clear the six-mana threshold and overflow firebending. Lean into extra-combat enablers (Aggravated Assault, Combat Celebrant, Hellkite Charger) plus haste/evasion equipment to make Ozai a true one-shot threat. Top end the curve with elite mana sinks like Torment of Hailfire and Comet, Stellar Pup, and protect your commander with cheap interaction so he always gets in.
The most-played cards for this commander, built from aggregated deck data (the Mythic Graph). Build public decks to seed it.
→ Infinite combat phases, Infinite red mana, Infinite untap of creatures you control
→ Infinite combat phases, Infinite red mana, Infinite untap of creatures you control
→ Infinite combat phases, Infinite red mana, Infinite untap of creatures you control
→ Infinite combat phases, Infinite red mana, Infinite untap of creatures you control
→ Infinite ETB, Infinite combat phases, Infinite red mana
Combos via Commander Spellbook.
Same color identity (BR), by popularity.