Board Thread:Plants vs. Zombies Wiki Discussion/@comment-6593079-20130222073026/@comment-4647769-20130329175128

I'll go for Gloom-shrooms. The only successful Survival Endless builds I've seen without them are a 12 cob which uses Spikerocks for Imps and Diggers and the infamous 24 cob.

Ah, yes, and two [b]incredibly[/b] reckless builds, one of which was 10 cob and one of which is 12 cob. Both of which use Cobs for Imps.