Demonic Goose

Demonic Goose has Flying, Haste and First Strike
{b}Demonic Goose has Deathtouch
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Creatures and Players that are attacked by Demonic Goose get a Flock Counter equal to Demonic Goose's Power
When any Creature/Player reaches 15 Flock Counters, multiply by 2 however many creatures
are on the field and that many 2/2 Geese with
flying and haste enter the field