1000 {poisoned} Status.Poison==1 Creatures.Beside==0 Self.Say(exana pox)
Or also:
1000 {poisoned} Status.Poison==1 Creatures.OnScreen<=1 Self.Say(exana pox)
Or also:
1000 {poisoned} Status.Poison==1 Creatures.OnScreen<=1 Self.Say(exana pox)