Board Thread:Plants vs. Zombies 2: It's About Time/@comment-26368790-20150504084253/@comment-26368790-20150508081804

Guys can someone help me with IBBG (IceBoundBattleGround) I finished the level but I know there's a frozen Imp outside because there's a slider so the Troglobite cannot push it,I tried the Lightning but I cannot use it,Why?Flamethrower works but Lightning doesn't,Now I'm stuck in the level,That is my gem generator :(  (That is the easy EZ for me)