Extremely helpful early game and even a bit later, maybe you need another tomb because your plume just got KOed. Maybe you need Bronzong next turn to D-Rush for the game.
It's a great card but ending your turn is annoying and I don't look at it and think =D the same way I do when I see Collector, only because my Uxie's can Set Up and other bench-powers. That and ending your turn are Call Energy's only flaw.
But I love this because I can burn it Trash Bolt, D-Rush fodder or even just retreat fodder too. Call Energy is absolutely amazing both early, mid and lategame in LuxChomp.
I give it 9/10. As I've said before, not 10 because I can't set up and stuff.