I like your idea of retribution but i think its a little OP. Drawing power is critical. A deck without drawing power will suck compared to a deck with drawing power. As a little reference from Yugioh (yes i play it, dont diss me for it), say this is your hand:
Avarice
Avarice
Avarice
* Tower
* Tower
***
***
Playing the two towers gets you 2 quanta (2), then you play avarice, and you draw 3 more towers. Play all 3 (5), then you play a small creature (2). Play another avarice, draw 2 towers and a monster and play 2 towers (4). Play avarice, draw 2 monsters and 1 tower, play it and then you realise that you have 3 mana. But you also have (count 'em!) 8... YES 8 towers. And you still have an avarice in your hand. You could play that, because when you play multiple avarices in ONE turn you skip TWO turns, so more or less you could draw 18 cards (provided you have enough space) and skip 2 turns. I dunno 'bout you, but i think that is kinda slack. Having a high draw power is broken with a low cost. Please increase the cost! That will only make the card fairer.