Mucks, Goblin Explorer

When Mucks, Goblin Explorer enters the battlefield, reveal the top six cards of your library.
Put all Goblin creature cards with converted
mana cost 5 or less from among them onto the battlefield and the rest on the bottom of your
library in a random order.
Whenever Mucks attacks, it gets +1/+1 until end
of turn for each other Goblin you control.