Drovnar's Deathstop

You cast forth the spell at a target you can see within range, making a ranged spell attack, the target can choose to allow the spell to hit though a roll of a 1 still misses.

The first time the target would drop to 0 hit points as a result of taking damage, the target instead drops to 1 hp, the target however then gains the paralysed condition until a greater restoration spell is used to undo it.

If the spell is still in effect when the target is subjected to an effect that would kill it instantaneously without dealing damage, the spell fails.