Forum:Shock master vs blaster element dragon

hi i was on dn and my opp summon shock master and calls monster effects and end this turn now my blaster elemental dragon effect to return to hand trys to activated but shock master negates it.. he says its a cost? but doesnt a cost need me to do something first? thanks for helping me on this Toromaster (talk • contribs) 10:34, April 5, 2013 (UTC)