Core Blast

Yu-Gi-Oh Card: Core Blast
Available from these partners:
Core Blast
Type:Continuous Trap
Text:You can only activate this card's effect while you control a face-up "Koa'ki Meiru" monster. Once per turn, during your Standby Phase, if your opponent controls more monsters than you do, you can destroy a number of cards your opponent controls so that your opponent will control the same number of cards as you control monsters.
Printings: Absolute Powerforce (ABPF-EN072)