Drawing an extra card every turn is something that should be special and we already have enough effects that do it.
It's different enough, I think. It's not drawing anything from your deck specifically, it's drawing cards from a pool of everything out there. It's kind of like Fate Egg for spells...actually, come to think of it, maybe it should be redone in that direction. Drawing a card every turn is a bit on the OP side. Toss out the upkeep cost, and just have it read "2: Sacrifice Omnitron to add a random spell card to your hand."