I don't really see how thematically it's invincible. It should die off on its own but also be able to be killed naturally as well. I don't really see how a dragon in magma doesn't die when I'm casting lightnings and shockwaves at it. Pretty sure being bathed in lava doesn't make you suddenly invincible.
Ah, I'll back him up on this. Though the image isnt very convincing of this, imagine the dragon is made of magma, rising from a pool of magma. By "melting" in the dragon is not targetable as the pool of magma is protecting it. Lightining and lightning storm meerly strike the surface, shockwave splashes the magma on top. The only time the dragon is vulnerable is while it's out of the magma attacking, thus vulnerable to shields.
You could argue that, and it does make sort of sense, but still, the idea of an immortal fire creature is sort of eh....
And invincibility makes it very, very powerful. Think about it. 3
for basically 35 damage. 7 attack for five turns. That's worth way more than 3
. And there's no way to get rid of it either until it dies by itself or by spine carapace.