Reins of Power

Instant, 2UU (4)
Untap all creatures you control and all creatures target opponent controls. You and that opponent each gain control of all creatures the other controls until end of turn. Those creatures gain haste until end of turn.¹
Illus. Colin MacNeil

Gatherer Card Rulings [Nov 2009]

• 10/4/2004: It is perfectly legal for either or both players to have zero creatures. They give control of all their zero creatures as instructed.
• 5/1/2007: You only untap creatures controlled by you and the targeted opponent, not all creatures.

Format Legality	Legal in Vintage, Legacy Banned in Extended, Standard, MTGO Classic
Printings (1/6)	Stronghold (Rare)