
Ashaya's power and toughness are each equal to the number of lands you control.
Nontoken creatures you control are Forest lands in addition to their other types. (They're still affected by summoning sickness.)
Ashaya turns all your nontoken creatures into Forests, fueling explosive ramp via untappers and land-matters payoffs while becoming a massive threat herself. You flood the board with mana dorks that now tap for tons of mana, then leverage that into huge X-spells, landfall payoffs, or a lethal Ashaya swing. The core loop is generating absurd green mana to overwhelm the table.
Add fast mana like Gaea's Cradle, Carpet of Flowers, and efficient dorks, plus tutors such as Green Sun's Zenith and Worldly Tutor to assemble combos faster. Include payoffs like Walking Ballista, Staff of Domination, and Umbral Mantle for clean infinite-mana kills, and round out with protection (Heroic Intervention, Veil of Summer) and recovery to survive wipes.
The most-played cards for this commander, built from aggregated deck data (the Mythic Graph). Build public decks to seed it.
→ Infinite ETB, Infinite landfall triggers, Infinite LTB
→ Infinite combat phases, Infinite mana lands you control can produce, Infinite green mana
→ Infinite LTB, Infinite ETB, Infinite sacrifice triggers
→ Infinite LTB, Infinite ETB, Infinite sacrifice triggers
→ Infinite LTB, Infinite ETB, Infinite death triggers
Combos via Commander Spellbook.
Same color identity (G), by popularity.