Honestly, for a guy with only 20+ cards i doubt you got CR cards... maybe it's all talk but if you can afford KV Raven's proposed build then good luck. Well the good thing is that you can buy credits so you can avail of the really expensive cards:
Well I recall having a battle with Mophral before and this was similar to his deck.
Lyse Teria Cr *3
Yh nightmare's bonus can reali mess a game up but the thing is they havn't reali got great cards