Forum:Elemental Hero Prisma in Hand?

So here's the deal: I'm working on a Destiny End Dragoon Rush Deck and got myself an Elemental Hero Prisma.

The Thing: I summon E-Hero Stratos and add 1 Plasma to my hand where I've already got a Polymerization and a Prisma. The Question: Can I use E-Hero Prisma's effect while it's in my hand?

Thanks for the Help