Bay, the Cheerleader

At the beginning of combat on your turn, up to 4 other target creatures you control get +1 | +0 until end of turn. Whenever one of those creatures deal combat damage to
an opponent, put a cheer counter on Bay.
At the beginning of combat during each opponents
turn, Bay gets +0 | +1 for each cheer counter on it until
end of turn.
Rewind squad - (rewind squad creatures are the colours
of your commander if your commander is a rewind
squad creature)