People keep saying "Oh it's not so bad because it can only use its ability if the opponent has a weapon"
That in no way makes this balanced, look at this card from the opponent's perspective. This isn't permanent control, it's permanent denial.
If you're playing someone who has this out or you know they have it, you're not going to play any weapons because doing so is going to give them a massive creature for 2
and you'll just end up wasting quanta.
The ONLY way I could see to balance this and maintain its current effects is to:
1) Lower the base damage
2) Make it a duo card or make it not destroy the opponent's weapon.
You guys should be ashamed of yourselves, only looking at this card from one perspective...