Changing "save or die" to "save or lose a lot of HP" is an interesting proposal.
I have played with similar rules even for transformation effects (e.g., petrification and polymorph) in other games, Champions coming notably to mind.
It would give an edge to classes (such as fighters) with higher average HP. It would make targets of high enough level effectively immune when at full strength, but potentially very vulnerable once worn down.
I would keep the "save" aspect, so as not to make low-level figures too vulnerable -- and also to allow DMs so desiring to keep the simpler "or die" (etc.) implementation.
Again, my ideal scenario would be to have options rather than changes by designer fiat.
I have played with similar rules even for transformation effects (e.g., petrification and polymorph) in other games, Champions coming notably to mind.
It would give an edge to classes (such as fighters) with higher average HP. It would make targets of high enough level effectively immune when at full strength, but potentially very vulnerable once worn down.
I would keep the "save" aspect, so as not to make low-level figures too vulnerable -- and also to allow DMs so desiring to keep the simpler "or die" (etc.) implementation.
Again, my ideal scenario would be to have options rather than changes by designer fiat.