Board Thread:Game Discussion/@comment-13282344-20130801014436/@comment-13184871-20130801030056

Will combining two 2 stars make a 4 star card? It doesn't in G.I. Joe. I know that this game may be different, but who knows.

Here's a helpful graphic for how it works in G.I. Joe.

http://images3.wikia.nocookie.net/__cb20130722213052/gijoebattleground/images/e/e8/GI_MASTERY.pdf