
Whenever one or more other creatures you control with base power and toughness 1/1 enter, put a +1/+1 counter on Bess.
Whenever Bess attacks, each other creature you control with base power and toughness 1/1 gets +X/+X until end of turn, where X is the number of +1/+1 counters on Bess.
Flood the board with 1/1 tokens (Citizens, Saprolings, Soldiers, etc.) to grow Bess into a massive threat, then swing wide to pump your entire 1/1 army with her attack trigger for a lethal alpha strike. Early turns build mana and token engines, mid-game you snowball counters, and you close by attacking with an army that suddenly gets enormous.
Add counter multipliers (Doubling Season, Branching Evolution) and proliferate sources to accelerate Bess's growth, plus efficient token doublers like Anointed Procession. Tighten the curve with fast ramp (Sol Ring, signets) and protect your engine with Heroic Intervention and Teferi's Protection against wipes. Finish faster with multiple Overrun effects so you don't rely solely on Bess connecting.
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 colorless mana, Infinite creature tokens
→ Infinite +1/+1 counters on a creature, Infinite death triggers, Infinite ETB
→ Infinite colorless mana, Infinite creature tokens, Infinite death triggers
Combos via Commander Spellbook.
Same color identity (GW), by popularity.