From the Vault: Exiled: Channel

Edition:	From the Vault: Exiled
Type:	Sorcery
Cast:
Rarity:	M
Collector #:	003
Until end of turn, any time you could activate a mana ability, you may pay 1 life. If you do, add to your mana pool.
Pro Tip! Channel has the ability to make some huge plays in the early game by using your life as a resource. How about casting a turn two Emrakul? Channel is currently banned in Commander and Legacy, and restricted in Vintage.