Boon of the Ultimate Assassin

Salazar Thaaris, known to all as the Cardinal, has achieved the pinnacle of what it means to be one amongst the shadows, and learning to exploit the vital points of enemies and weaken them, either close range or at a distance.

You gain access to a unique resource called Subsistence ☠️ . You gain one charge of this resource on the start of your turn, and have multiple ways to gain more charges:

- Whenever you roll a crit, you gain 1 charge.
- When a creature succeeds on your death strike, you gain 2 charges, and 4 if they fail.
- When you are undetected and forego your turn, you gain 6 charges.

You can have a maximum of charges equal to your dexterity score. You start with zero charges when you roll initiative, and these charges last for an hour.

You may expend these charges in the following ways for these effects:

1 ☠️ - Roll a stealth check to hide using a box made of cardboard as a free action on your turn. On entering the box, you regain hit points equal to twice your proficiency modifier plus your Wisdom Modifier, and you gain 100 THP. When the THP depletes, the box is destroyed and you can teleport as a reaction to a location within 60ft. (This THP does not stack)

2 ☠️ - When you take the attack action, you can make one additional attack this turn. This attack can benefit from your Sneak Attack even if you have already used it this turn.

3 ☠️ - When you land an attack roll on a creature, you may impose your death strike ability on that creature, with the saving throw's DC increased by 1. This DC increases each time you use this feature on a target. Additionally, if the creature succeeds on the save, the damage dealt on the attack that applied the Death Strike is doubled.

4 ☠️ - You can roll two additional sneak attack die when determining the sneak attack damage for a critical hit with an attack roll.

8 ☠️ - When you are invisible, as a bonus action, you may roll a stealth check and leave a shadow duplicate of yourself at your last position before going invisible. This shadow lasts for a minute, before it dissipates. The shadow follows your movements and whenever you would be attacked, the shadow duplicate is attacked instead till they pass an investigation check (requires an action) with a DC equal to your stealth check. (Note that this shadow is immune to all forms of damage and can't be detected as an illusion from special sights).