Channel

Sorcery, GG (2)
Until end of turn, any time you could activate a mana ability, you may pay 1 life. If you do, add {1} to your mana pool.¹
Illus. Richard Thomas

Gatherer Card Rulings [Nov 2009]

• 10/4/2004: You can't pay life points you don't have. In other words, you can't Channel yourself below zero life.

Format Legality	Restricted in Vintage Banned in Legacy, Extended, Standard
Printings (5/18)	Fourth Edition (Uncommon) Revised Edition (Uncommon) Unlimited Edition (Uncommon) Limited Edition (Beta) (Uncommon) Limited Edition (Alpha) (Uncommon)