Delayed Heal

Vines sprout from the ground blooming flowers around a target in sight, the pollen from the flowers heals the target depending on the amount of health the target has

3/4 health or up restores to full

2/4 health or up restores to 3/4

1/4 health or up restores to 2/4

Below 1/4 health( including 0) restores to 1/4 

If your target failed all their death saves the caster can sacrifice a die of hit points depending on class (barbarian =1d12, wizard = 1d6, etc)

The casters total lvl must be lvl 5 for them to sacrifice their hp to save someone from death