Reyufa and the Swarm

When Reyufa and the Swarm enters the battlefield, each player who does not control a
creature named Reyufa and the Swarm creates a
token that is a copy of it.
At the beginning of each upkeep, create a 1/1
black Rat creature token.
Rats you control cannot attack any player who controls a nontoken creature named Reyufa and
the Swarm.