Muxus, Goblin Grandee

When Muxus, Goblin Grandee enters, reveal the
top six cards of your library. Put all Goblin creature cards with mana value 5 or less from
among them onto the battlefield and the rest on the bottom of your library in a random order.

Whenever Muxus attacks, it gets +1/+1 until end of turn for each other Goblin you control.