Probably three. It has been three for a while now.

September 1, 2011 by A Wikia contributor

If you dont want it,STOP PLAYING YOU B***H!!!!

August 29, 2011 by A Wikia contributor

Hey, at least it's something that has a use in the game unlike the pigs we started off with.

August 30, 2011 by A Wikia contributor

Pignatas had a use in the game. They dropped 5 different kinds of loot and a Grand Prize Iron Titan which is still in the top 25 best defense vehicles. Besides Pignatas and this event are very different. Pignatas were like Red and Blue Mystery Bags (Mystery Gifts) and this event is a Gift Mastery event where you need to collect items (this case boosts) to get gold on another Mastery Reward item and then gold on all 3 for a Grand Mastery Reward.

August 30, 2011 by Mazdafreak

Not Pignatas, the Prized Pigs event that had Oinker as the grand prize.

September 3, 2011 by A Wikia contributor