Crap Silo

The  is a limited-time premium building that was released on February 18, 2015, as part of the Superheroes 2015 Event. Upon completion, Plopper is unlocked.

It re-released on June 28, 2016, during Issue 2 of the Superheroes 2016 Event.

Regular
Plopper
 * Roll Around in Muck - 4h
 * Do Whatever A Spider Can - 8h
 * Make a Deposit - 24h

Quest Based
Plopper
 * Catch a Radioactive Spider - 8h