*re-reads card*
Ah, it does say immaterial.
Thus, the only method of healing it has would be the bonus from more quanta, or some currently unreleased card that will heal a creature without being targeted.
However, it also means that it is not going to be on the wrong end of a freeze/shockwave, or most forms of creature control for that matter, and, as such, someone is going to have to go though it, either by pure damage, or with momentum.
Again, scary card, but not something that is so amazing that it would overpower anything and everything else.