Yes, Living Dragonbreath is playable

Your main goal is to bait out your opponents removal in the early game with low-cost mechs.

You secondary goal is to magnetize a Missile Launcher onto you Chugger and lock the opponent out of the game.

You have some heavy draw engines, so wait until you have Aluneth before playing your mana cheats.

The ultimate combo is to magnetize Zilliax and Sn1p-Sn4p and go face for 20+ damage.

And of course, yes, protect and keep your own minions toasty warm with