This guy at least had a decent plan and has a second bomb by the arena where everyone is so even if he's stopped he'll still kill a ton of people. In fact he being there is probably DOUBLE BAIT.
Bad guy : MWAHAHAHA let me explain my malefic plan while doing frightening poses !! There is absolutely no way you can suck power from gems anyway !
Hero : *suck power from gems*
Bad guy : *shocked pikatchu face*