Aesi, Tyrant of Gyre Strait [Duskmourn: House of Horror Commander] Modern Horizons 2 Prerelease Promos you may cast it without

you may cast it without paying its mana cost

Other non-Human creatures you control get +1/+1 and have undying

When the Ring tempts you

Reverse Type: Legendary Planeswalker — Arlinn Nightbound +2: Add {R}{G}

Eventually

Aesi, Tyrant of Gyre Strait [Duskmourn: House of Horror Commander] Modern Horizons 2 Prerelease Promos you may cast it withoutSet: Duskmourn: House of Horror Commander Type: Legendary Creature Serpent Rarity: Mythic Cost: {4}{G}{U} You may play an additional land on each of your turns. Landfall Whenever a land you control enters, you may draw a card. "To sail through those waters is to offer oneself as tribute." Captain Hoyrik