Zhonya's Hourglass

gear

[Hidden] (Hide now for [A] to react with later for energy 0.) If a friendly unit would die, kill this instead. Heal that unit, exhaust it, and recall it. (Send it to base. This isn't a move.)

Rulings

• What about Zhonya’s Hourglass and Stand United? When they’re played from hidden, are their effects restricted to the battlefield where they were played?