Optional visual effect for other low resources

[Dwindlehop]

The low HP graphic indication is such a huge lifesaver. I do not know how I ever played a roguelike without it.

Some classes would like a similar visual indication if certain resources other than HP go down. Some classes don't care, or would find this annoying. It definitely would be annoying for certain resources (positive energy). However, with big shields, Mana Clash can be easy to miss in a big fight. When my mana bar is low (or equilibrium failure rate is high, etc) I would really like a similar visual effect to the low HP (grey screen, floating message) as a warning.