Tolarion, Watcher of the Sea

Bestow {5}{u}{u}
Whenever Tolarion, Watcher of the Sea attacks, return target creature to it's owners hand. Create a token that's a copy of that creature.
Enchanted creature gets +4/+4 and has "Whenever this creature attacks, return target creature to it's owners hand. Create a token that's
a copy of that creature."