Ragnarock Pest

Landmorph (You may play this card from your hand onto the battlefield face down as a land with "{t} : Add {1} to your mana pool." Turn it face up any time for its mana cost.)
When Ragnarock Pest is turned face up, you may tap lands you control. For each land you tapped, put a 3/1 red Beast creature token with haste onto the battlefield.