Just some spitballing, don't mind me.
Blood Weapon (Trait): Recover HP equal to 50% of damage dealt each time you inflict magical damage.
(Original effects folded into Delirium.)
Darkside (1 min CD?): Increase damage dealt and healing received by 20%. Can only be activated while at 50% health or below.
Duration: 20 sec?
(While Darkside is active, certain combo attacks may also change to deal partial Unaspected damage, and the button changes to Shadowbringer while active at level 90.)
Penance (1 min CD?): Grants Penance to self, absorbing and negating most incoming healing effects up to 100% of your maximum HP, while changing the action to Absolution.
Duration: 30 sec?
When HP falls below 25% or upon effect duration expiration, Absolution automatically activates.
Absolution: Consumes the Penance effect to nullify damage totaling up to the amount of healing it absorbed.
Duration: 15 sec
Dread Spikes (25 sec CD): Reduces damage taken by 10% and delivers an unaspected attack with a potency of 30 every time you receive damage from an enemy.
Duration: 7 sec
Additional effect: Restore partial MP when damage is taken
Shares a recast timer with The Blackest Night.
Upgrades at 82 to:
Blood Spikes (25 sec CD): Reduces damage taken by 10% and delivers an unaspected attack with a potency of 50 every time you receive damage from an enemy.
Duration: 8 sec
Additional effect: Blood Weapon's effects are doubled
Additional effect: Restore partial MP when damage is taken
Additional effect: Grants Shadowskin, reducing damage by an additional 10%
Duration: 4 sec
Shares a recast timer with The Blackest Night.
The Blackest Night (25 sec CD, no MP cost): Creates a barrier around target party member that absorbs damage totaling 25% of your maximum HP.
Duration: 7s
Grants Dark Arts when barrier is completely absorbed.
(82 trait) Additional effect: Grants Oblation, increasing healing received by 10%.
Duration: 8 sec
Additional effect: Grants Shadowskin, reducing damage by an additional 10%.
Duration: 4 sec
Shares a recast timer with (Dread/Blood) Spikes.
Living Dead (5 min CD): Renders you impervious to most attacks, but drains health equal to 10% of your remaining HP every second.
Duration: 10 sec