Torrent of Lava
Mirage — rare
Sorcery
Torrent of Lava rulings:
2008-08-01: It grants the activated ability to creatures while on the stack. This allows the ability to be activated and resolved before the Torrent itself resolves.
2004-10-04: If X is zero, it deals no damage (not -1 damage) to non-flying creatures it taps.