And what would you kill with the 3 pandemoniums? Not very much isn't it...
You can use this for pvp, but it'd certainly suck in T50, both against rainbow and RoL-Hope. RoL-Hope you'd only win if your opponent actually draws and plays both light dragons and you antimatter them before you get killed by RoLs and electrocutor. There isn't much to antimatter when you're up against a rainbow.
You could try the following:
-1 I.Antimatter, -1 Purple Dragon, -1
Pillar
+1 Discord, +2 Pandemonium
Nevertheless, there are many other more reliable decks around for pvp and T50 respectively.