[the_matrix_walker]

Even a narrow damage channel at this point would be enough for them to effectively attack us and I don't think we can resist them long enough to complete the work otherwise...

So Vassarious will Change shape and become the largest mass of light fire-resistant construction foam they can muster expanding out and forcing the temple's other inhabitants out on a wave-like wall, bursting out of all of the temple's doors and windows over the ten seconds it takes to reach their maximum volume.

Vassarious steels their will, knowing that this act may be their last. Seeing no other path to success Vassarious hopes that enough of their volume will be unaffected by the tunneling that they are able to survive what is coming.

Shapeshifting!
3d6
6 + 1 + 2 = 9