Hearthpwn

worse Volatile Elemental.

I had a good interaction with this. Magnetize it with Zilliax, then use Necrium Vial! You'll get 8 heals!

Compared with Spider Bomb this looks absolutely terrible. Sure it's a Neutral, but Spider Bomb's usability is already questionable in the first place.

Art is great, card is ok

Boombot with +1/+1 that guarantees 4 damage to a minion on its deathrattle. It's okay. Probably better for Arena though. 

Flamecannon with a 1 mana 2/2 body, which does exist so I guess this is fair and balanced. I can imagine some budget deck running this in their magnetic deck. Maybe it will see SOME play too.

Penguins from Madagascar anyone?

Flamecannon on a 2/2 body and mech? I like this one

I'd argue its a worse Volatile Elemental but I guess its situational. Not a horrible card but it wont be played in constructed.

Finally the "Boombot" of the expansion. A deathrattle mech for turn 3, perfect for hunter and it,s various death rattle triggers

I agree

Bomb Lobber + Boom Bot =