Flying
Whenever this creature deals combat damage to a player, proliferate. (Choose any number of permanents and/or players, then give each another counter of each kind already there.)
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ThrummingbirdShowcase · Step-and-Compleat FoilPhyrexia: All Will Be One · 432 · uncommon$2.89
ThrummingbirdCommander Anthology Volume II · 52 · uncommon$0.39
ThrummingbirdNew Capenna Commander · 236 · uncommon$0.36
ThrummingbirdScars of Mirrodin · 47 · uncommon$0.34
ThrummingbirdPhyrexia: All Will Be One · 72 · uncommon$0.32
ThrummingbirdCommander Masters · 858 · uncommon$0.31
ThrummingbirdThe List · 52 · uncommon$0.31
ThrummingbirdModern Masters 2015 · 65 · common$0.28
ThrummingbirdShowcasePhyrexia: All Will Be One · 288 · uncommon$0.28
ThrummingbirdEdge of Eternities Commander · 80 · uncommon$0.26
ThrummingbirdCommander 2016 · 100 · uncommon$0.25
ThrummingbirdThe Zeta Set · 153 · uncommon
Dark Ritual159 · uncommon$0.25
Windfall154 · uncommon$0.25
Urborg, Tomb of Yawgmoth121 · mythic
Command Tower360 · common
Vandalblast69 · common
Dark Ritual280 · uncommon
Ornithopter351 · common
Giant Spider196 · common
Clone15 · uncommon
Narcomoeba268 · common
Urborg, Tomb of Yawgmoth242 · mythic
Sol Ring114 · uncommon