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the following rule does not currently apply.

Cards that allow a player to arbitrarily exchange life for another resource without other costs as a limit are banned, including but not limited to:

Bolas's Citadel
Necropotence
Necrologia
Ad Nauseam
Treasonous Ogre

K'rrik, Son of Yawgmoth
Vilis, Broker of Blood
Doom Whisperer
Toxic Deluge
Pain's Reward