So with the new Librams spell cards for Paladin, I see a nice Mana Addict and Libram of Wisdom to nicely fit together? If you can get 5 copies of it back to your hand that makes Mana Addict gain + 10 Attack +5 from Librams = 15 Attack. Ez OTK combos with Blessed Champion
Actually, I see it kinda viable. I've used Mana Addict on a cheap spells Mage, and it lived on board for a couple of turns, because no one ever sees that card, so no one takes it seriously and just lets it live XDD I'm gonna try it, for sure, this Libram stuff sounds fun :P
Edit: Ok, I think I forget to mention. No, don't use Mana Addict as an OTK combo, that is never going to work. But for some surprise damage on your oponent, sure, go for it. Just don't make it the central piece of a deck never xD
There was already a similar combo but with priest, x2 Radiant Elemental and x2 Shadow Visions one on the deck and the other in the hand. It is very fun and satisfying to make the combo but not very viable.