Viridian Betrayers

Oracle Text

Viridian Betrayers has infect as long as an opponent is poisoned. (It deals damage to creatures in the form of -1/-1 counters and to players in the form of poison counters.)

Card Rulings

6/1/2011 A player is poisoned if that player has one or more poison counters.
6/1/2011 The player must be poisoned when Viridian Betrayers deals damage in order for Viridian Betrayers to have infect. If the player has no poison counters, damage dealt to that player by Viridian Betrayers will result in loss of life, even if it’s dealt at the same time as damage from another creature with infect.