
Each other creature you control enters with a number of additional +1/+1 counters on it equal to Arwen's toughness.
Cast cheap Arwen early, then flood the board with creatures that all arrive massively buffed with +1/+1 counters equal to her toughness. Pump her toughness to scale the buffs higher, and convert that counter advantage into overwhelming combat damage or counter-synergy payoffs. You win by going wide with oversized creatures and trampling/swinging through.
Prioritize counter doublers (Hardened Scales, Branching Evolution, Kami of Whispering Lake) and toughness boosters to maximize Arwen's output, plus The Ozolith to insulate against removal. Add efficient mono-green ramp (Three Visits, Nature's Lore, Cultivate) to deploy threats ahead of curve, and finishers like Craterhoof Behemoth or Pathbreaker Ibex. Round out with protection (Heroic Intervention, Snakeskin Veil) and a recursion package so a board wipe doesn't end the game.
The most-played cards for this commander, built from aggregated deck data (the Mythic Graph). Build public decks to seed it.
→ Infinite ETB, Infinite LTB, Infinite colorless mana
→ Infinite ETB, Infinite LTB, Infinite death triggers
→ Infinite +1/+1 counters on a creature, Infinite ETB, Infinite LTB
→ Infinite ETB, Infinite LTB, Infinite colored mana
→ Infinite ETB, Infinite LTB, Infinite death triggers
Combos via Commander Spellbook.
Same color identity (G), by popularity.