Norra's Portalpalooza

You may only cast Norra's Portalpalooza if no other spells or abilities are on the stack.

Reveal cards from the top of your library until you reveal two creatures of mana value 3 or less. Put those creatures on the battlefield tapped and the rest on the bottom of your library in a random order.

If Norra is levelled, search for creatures of mana value 4, 5, 6, or 7 instead.