Boundary of Death / Revenge

Revenge/Boundary of Death. Drawing the Hatred, Agony and Pain from the user, the spell convert it all to a target, in form of a soul and mind damaging Force.
Roll an Arcane ability Check Contested against the target's DEX, you have advantage on the check those that attacked you earlier , and vice versa, they'll have disadvantage on you.

Revenge. Roll a 1d100, on a 4, deal 1d4 + 100% of the HP the user has lost due to damages, x2 on those that attacked the user [200%]. 
Hatred. Mark any foes or attackers that attacked the user with "Hatred" which will grant you the special effects of this spell.
On Clash, win. Necrotic, Slashing 1d4, 10 Staggers, 3 Overwhelmed¡! If 4, Plus 100%/200% Psychic damage equal to the amount of HP Loss the user has.

Boundary of Death. The 1d100 dice, can in fact be altered based on the user's HP. At 100% HP, the rate to get 4/4 Boundary of Death is almost impossible, and even if you got one, it'll does nothing, (100%/200%  0 = 0) 0.04 or 4%. Once the user lost 5% of their HP, Rounded up, the dice becomes a d90, 10% = d80; 15% = d70, 20% = d60, 25% = d50.

• From 25%, The Probabilities of getting 4/4 is now instead, affected by how much HP the user has lost.
Therefore. 25% = Roll a 1d20, on a 20, 4/4 Boundary of Death happens. 
                   50% = Roll a 1d12, on a 12, 4/4 Boundary of Death happens.
                   75% = Roll a 1d6, on a 6, 4/4 Boundary of Death happens.
                   90->99% = Roll a 1d2 (Flip Coin), on a 2, 4/4 Boundary of Death happens.
                   100% = 4/4 Boundary of Death (Impossible unless Home rules.)

Vengeance. On Kill, the user recover 25% of their HP, Rounded up.