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As Circle of Affliction enters the battlefield, choose a color.
Whenever a source of the chosen color deals damage to you, you may pay {1}. If you do, target player loses 1 life and you gain 1 life.
Each time a source deals damage to you, you may pay {1}. You can’t pay more than {1}, even if more than 1 damage was dealt.
If several sources deal damage to you simultaneously (for example, several attacking creatures), this ability triggers once for each source.
If the damage reduces you to 0 or less life, you lose the game before Circle of Affliction’s ability has a chance to give you life.
The player you target doesn’t have to be the controller of the source that dealt damage to you.
