Banding of the Dragon Slayers

Creatures you control that share a creature type
have Banding (Any creatures with banding, and up to
one without, can attack in a band. Bands are blocked
as a group. If any creatures with banding you control
are blocking or being blocked by a creature, you divide
that creature's combat damage, not its controller,
among any of the creatures it's being blocked by or is blocking.),Trample and Vigilance