Text (6th+errata): {2}{R}, Sacrifice two Goblins: Put three 1/1 red Goblin creature tokens onto the battlefield. [Oracle 2009/07/08]
The token Goblins can be fed back to the Warrens to generate new Goblins. They are Goblin creatures in every way. [Duelist Magazine #4, Page 7] Basically, you are paying R2 for each Goblin. But, this removes enchantments from existing Goblins and now all 3 of the new ones entered play this turn cannot attack since you have not controlled them since the start of your most recent turn.
