Forum:Dark Magician, problem with Elemental Hero

I havee recently decided that I want to make a new sort of Dark magician deck. I have used spellcasters as my main type and love using DM. I currently run a Secret Village beatdown style deck and it is quite sucessful.

The new deck I wanna make is a diamond dude turbo but for this deck I require elemental hero prisma and using its effect to change name to become dark magician for the turn setting up my DM Knight/ D.Erad Warlock/ DM attack combos and beating my opponent thoroughly and quickly. I will run 2 Royal decrees (its semi-ed I think) and the rest will all be normal spells. My problem is that until E.Hero prisma comes out in Gold Series 3 (whihc isn't long but I may not get it) It costs way too much in the UK to get it ( on par with mirror force....), so yugioh wikia, any viable replacements for it? I have thought of using phantom of chaos after dumpin DM for cards like divine wrath, lightning etc.