
Haste
: Create a token that's a copy of target nonlegendary creature you control, except it has haste. Sacrifice it at the beginning of the next end step.
Kiki-Jiki untaps and copies nonlegendary creatures for value or to assemble a combo kill. Early turns ramp into Kiki, then you either grind ETB/attack triggers via repeatable copies or untap Kiki with a partner creature to make infinite hasty tokens and swing for lethal. Mono-red gives you fast mana, untappers, and burn backup.
Add more untap enablers and protection (Deceiver Exarch via mono-color staples are blue, so lean on Zealous Conscripts, Combat Celebrant, Dualcaster Mage and haste-granters) plus impulse draw like Outpost Siege and Wheel of Fortune to refill. Improve mana with Jeska's Will, Mana Geyser, and Goblin Engineer/tutors such as Imperial Recruiter and Gamble to find combo pieces. Finally, add cheap protection and recursion (Lightning Greaves, Boros Charm-style indestructible effects, and Faithless Looting/Feldon to rebuy creatures) so a single removal spell doesn't end your plan.
The most-played cards for this commander, built from aggregated deck data (the Mythic Graph). Build public decks to seed it.
→ Infinite creature tokens with haste, Infinite death triggers, Infinite ETB
→ Infinite combat phases, Infinite creature tokens with haste, Infinite ETB
→ Infinite death triggers, Infinite ETB, Infinite LTB
→ Infinite creature tokens with haste, Infinite death triggers, Infinite ETB
→ Infinite creature tokens with haste, Infinite death triggers, Infinite ETB
Combos via Commander Spellbook.
Same color identity (R), by popularity.