Invoke the Winds

Threaten effects live in red, where the standard bargain is a permanent for a turn, at end of which the stolen thing goes home. This one strips that clause entirely: gain control of an artifact or creature, keep it permanently, and untap it. The theft is priced not in mana value (five is unremarkable) but in color commitment, the demanding a devout blue base to unlock it. Permanent control-change has always been blue's beat: Control Magic, Steal Artifact, Blatant Thievery, the whole aura-and-sorcery tradition of taking a thing and simply keeping it. What sets this one apart from the classic control-magic auras is that there is no enchantment left on the battlefield to answer; kill the aura and the target snaps home, but a resolved sorcery leaves nothing to disenchant. The untap rider is quieter than it looks: it does not grant haste, so a stolen creature is summoning-sick and cannot attack or use tap abilities the turn it changes hands. What the untap buys is defense and availability, freeing a tapped blocker to guard your side, or readying an artifact whose relevant ability is not tap-gated. What balances the card is the sorcery speed and the quadruple-blue tax, not any leash on how long you keep the target. You pay full devotion up front, and in exchange the thing is simply yours.