Electrocutor, Golems and Fractals. Electro is 5 damage for 3 quanta, then 1 quanta for each Golem = 8 or 10 attack for 3 quanta. It's two cards for 13/15 damage the first time you do the combo, and then it's 1 card for 8/10 damage. Even more unbalanced than Graboid. I think that might be a record.
Easily fixed though: make Dispel remove passives as well (if it didn't already) and make Inanimate a passive. This would mean you could -only- use Golem with Dispel, at which point we end up with a forced combo of course.
Now, you say both card ideas should be viable on their own, but Golem's HP isn't nearly high enough to be useful for GP or Catapult on its own. Dispel has a bit more use than Holy Light, but still appears to be just about as weak since the other two forms of skill removal are repeatable (Flayer, Lobo). And we all know how little Holy Light is used.