Swarm's Ascendency

Swarm {3}. (You can pay {3} to group any number of insect creatures you control together into a swarm.
A swarm is considered a single black and green insect creature named "Swarm" with the power and
toughness of all the creatures in the swarm combined.
The swarm only has keyword abilities that are shared
between all the creatures that are part of it. You can
also pay {3} to undo this effect.
Only swarm as a sorcery.)