Board Thread:Game Discussion/@comment-12919914-20130912020226/@comment-10782738-20130912145837

Glass cannons = Strong Attack & Weak HP/Defense

No energon for the special evolve campaigns. Those are collected from the Raidboss events if you seeded a lot of low level bosses (can't remember if Ironhide gave you any). If you run out of energon for this event, you pretty much are farming battle cubes.

Happened to me on the Ultra Magnus Evolve event, but had quite a good amount of battle cubes for the previous Optimus Event.