
Flying
Mentor (Whenever this creature attacks, put a +1/+1 counter on target attacking creature with lesser power.)
Whenever a nontoken creature you control dies, if it had counters on it, create X tapped 2/1 white and black Inkling creature tokens with flying, where X is the number of counters it had on it.
Felisa turns +1/+1 counters into a steady stream of flying Inkling tokens. You buff your creatures with counters (via Mentor, proliferate, and counter sources), then sacrifice or trade them to flood the board with evasive 2/1 fliers. Win through wide aerial swarms backed by anthems or aristocrats payoffs.
Add counter doublers (Doubling Season, Hardened Scales) and token doublers (Anointed Procession, Parallel Lives) to multiply output, then layer reliable sac outlets like Viscera Seer and Ashnod's Altar. Tighten the aristocrats package with Blood Artist, Bastion of Remembrance, and Pitiless Plunderer for inevitability, and include proliferate sources like Flux Channeler to grow counters without combat. Top it off with protection (Teferi's Protection, Heroic Intervention) since your board is sweeper-vulnerable.
The most-played cards for this commander, built from aggregated deck data (the Mythic Graph). Build public decks to seed it.
→ Infinite +1/+1 counters on a creature, Infinite colored mana, Infinite commander casts
→ Infinite colored mana, Infinite death triggers, Infinite ETB
→ Infinite colored mana, Infinite death triggers, Infinite ETB
→ Infinite colorless mana, Infinite creature tokens, Infinite death triggers
→ Infinite colorless mana, Infinite creature tokens, Infinite death triggers
Combos via Commander Spellbook.
Same color identity (BW), by popularity.