Why an Evil Lair ?! well.. because it is ;) 

So what have others to tell about it ?

An evil lair is a well hidden base from which an aspiring evil genius seeks to carry out his plans. A lair is typically staffed by a variety of henchmen and minions, who seek to serve their master, usually out of fear, greed or mind control. [wikipedia article]

So be afraid, be very afraid, Rainboy will take over the universe (why start small ?!)