Ashaya, Soul of the Wild [Duskmourn: House of Horror Commander] Masters 25 Whenever Sphinx Ambassador deals combat

Whenever Sphinx Ambassador deals combat damage to a player

and here's its fantastic follow-up: the red version piloted by not-quite-incognito Char Aznable -- er

Abilities you activate that aren't mana abilities cost {2} less to activate

untap the creature

Ashaya, Soul of the Wild [Duskmourn: House of Horror Commander] Masters 25 Whenever Sphinx Ambassador deals combatSet: Duskmourn: House of Horror Commander Type: Legendary Creature Elemental Rarity: Mythic Cost: {3}{G}{G} Ashaya, Soul of the Wild'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.)