How do I research hero co-operation?
Last Modified:
How do I research hero co-operation?
Hero cooperation is a research item under each of the 4 Legion research trees. (once you have unlocked all 4 legions).
Hero cooperation is about half way down each of the legion research trees and will unlock the second hero slot for your legion (to place the second hero). You need to research the other items above it first.
Answer this question: