Hemorrhagic Link

You take 20 points of damage that can’t be mitigated. By doing so, you draw a seal of blood in the air that becomes invisible and lasts for up to an hour. Through touch, you can place it on a living target. The target must make a Wisdom saving throw. On a failure, all damage you take is redirected to the target for the duration of the spell.

Immunities and resistances that you or the target have apply normally to the damage received. Whenever the target is the target of an attack and takes damage, it can repeat the saving throw with advantage. Each time it takes damage, the DC of the saving throw decreases by 2.

The bond is broken if the target is reduced to 0 hit points or if it succeeds on the saving throw. If the target of this spell is willing, it can end the link at any time.

If the target is reduced to 0 hit points, its body shows no wounds; only under a deeper medical examination is it possible to notice that its blood has been weakened.