Warrior of Rohan

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.)
Whenever Warrior of Rohan attacks or blocks, if
you control another attacking or blocking
creature, Warrior of Rohan gets +1/+1 until end
of turn.