No change to "you claw at the glass" with digging claw and Shovel Claw in deck, nor with sledge hammer, nor with a crow bar with 5 Pry in my deck. Can we borrow a jackhammer from the construction site?
You claw at the glass, if it's really even glass, but find no purchase. Its connection with the surrounding wall is perfectly seamless, as though part of it just became transparent… or the entire wall grew organically.
Nor all the above while sober.
You pry at the glass… well, not glass, but whatever they made the barrier from. It even feels a little like glass, but it doesn't break like glass and it's perfectly integrated with the vault wall… as though part of the wall just happens to be transparent.
Also - nothing special for staring at the skull with a blindfold on, sober or etheric.