Oketra the True (Invocation) [Amonkhet Invocations] Legendary Land Whenever you tap Forbidden Orchard

Whenever you tap Forbidden Orchard for mana

Return Thawing Glaciers to its owner's hand at the beginning of the next cleanup step

Set: Commander Anthology Volume II Type: Artifact Creature — Phyrexian Wurm Rarity: Mythic Cost: {6} Deathtouch

They likely refer not to one mage

{T}: Add {U}{U}

Oketra the True (Invocation) [Amonkhet Invocations] Legendary Land Whenever you tap Forbidden OrchardSet: Amonkhet Invocations Type: Legendary Creature God Rarity: Mythic Cost: {3}{W} Double strike, indestructible Oketra the True can't attack or block unless you control at least three other creatures. {3}{W}: Create a 1 1 white Warrior creature token with vigilance.