Butterfly Sanctuary

{t}: Create a 1/1 green Insect creature token
with flying and swarm named Butterfly.
(Whenever a creature you control with swarm
attacks or blocks, it gets +1/+1 for each other creature
you control that shares a type with it.)
"It has been said that something as small as the flutter
of a butterfly's wing can ultimately cause a typhoon
halfway around the world"
— Aleatha Romig