Giant's Grasp

Control-magic effects usually cost a card and a chunk of mana for the privilege of borrowing something big. This one folds the theft into a tribal gate: the Aura can only enchant a Giant you already control, and the steal fires off that enchant trigger. The permanent stays yours only while the Aura sits on that Giant, which welds two fragile pieces together. Kill the Giant, or bounce or destroy the Aura, and the borrowed permanent snaps back to its owner. That double-vulnerability is unusual for a control enchantment, since most battlefield-editing effects of this shape care only about their own presence, not the survival of a second creature. The result is a theft that punishes overextension into removal, because a single well-aimed spell can undo two of your cards at once, and rewards a board where the Giant is already protected. Enchantments that grant control "for as long as this remains" have existed since the early sets, but few of them route the effect through a creature type at all, and fewer still stake the whole steal on that creature staying alive. The design reads less as generic removal-plus-tempo and more as a payoff wired specifically to a Giant board, paying you for having the right body on the table before the theft ever resolves.