Right now I'm trying to slap together a houndoom slowking mill deck, so on top of discarding energies, you are putting energies on a benched shaymin of whatever you come across. Here is an example: you are playing against a Manectric/Yveltal deck and they have an Yveltal active with a Manectric benched. You have 2 slowking on the bench and flip heads on one and tails on the other. You send a double colorless energy to Manectric and flip heads on a crushing hammer and discard a dark energy. Then you melting horn and discard a dce and a muscle band.