The Hidden Fortress

Hexproof
If you would lose due to having zero or less life and The Hidden Fortress is fortifying a land, instead diminish all permanents you control.
You lose the game at the end of your next turn.
Fortify {u}{b}{r} ({u}{b}{r}: Attach to target land you control. Fortify only as a sorcery. This card enters the battlefield unattached and stays on the battlefield if the land leaves.)