Talk:Challenger/@comment-5170685-20121212083326

I really need help. my best land unit are lvl 4 challengers and lvl 6 cobras, I do not have enough time to complete events but now i tried my best and got 600 exp for the shockwave event what should I get that can help me repel invaders with hellfires and elite warhawks and sometimes kondors. (I have not unlocked any event unit yet)