Flying Whenever Guildpact Informant deals combat damage to a player or planeswalker, proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)
Near Mint - £1.40
Lightly Played - £1.20
Moderately Played - £1.00
Heavily Played - £0.70
Damaged - £0.50
Near Mint Non English - £1.40
Lightly Played Non English - £1.20
Moderately Played Non English - £1.00
Heavily Played Non English - £0.70
Damaged Non English - £0.50