An interesting card for sure. Not sure how good it will be yet. I can see this card becoming quite a pain in the a$$. Play this, opponent kills it and leaves a 1/1 bomb that just gets magnetized by some other mech for quick damage. This card has possibilities.
Perfect card for Galakrond Warrior that will replace Quatermaster or Lirewire Lance in the 3 drop spot. Good synergy with enrage mechanic while leaving a mech behind that can be magnetize or deal 1-4 damage, I really like it.
At worst it's a 2/3 that summons a 1/1. It's a bit worse than harvest golem, but since the 1/1 is a boombot, bomb wrangler is better. Not to mention that it has the potential to summon multiple boombots. Its probably one of the better self damage synergy cards, but even in Wild, there isn't much support for a self damage deck (Closest you'll get is Patron Warrior)