[Polymer] Weapon - Augmenteer (Patreon)

The tubes of this axe attach to a bracer that directly connects to the veins of its wielder. Most biohancers mix personal concoctions for physical enhancement, but some choose to absorb the blood of their fallen enemies instead, resulting in even stronger concoctions.

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AugmenteerWeapon (handaxe or battleaxe), uncommon (requires attunement)

You must spend the duration of the attunement period attaching this magic weapon's injectors to your arm. Once attuned, you cannot be disarmed of the weapon unless a creature spends a minute to forcibly remove the injectors, which ends the attunement and reduces your hit points by 4d8. Your hit point maximum is reduced by an equal amount until you finish 1d3 long rests.

Crimson Fury. This weapon has 3 charges and all regains expended charges daily at dawn. As a bonus action, you can expend a charge and inject yourself with a dose of the weapon's adrenaline mix. You gain the following benefits until the end of your turn:

You have advantage on Strength checks and saving throws.

You have a +2 bonus to attack and damage rolls you make with this weapon.

Blood Charger. When you use this weapon to kill a blooded creature with a challenge rating of 2 or higher, the weapon absorbs the creature’s blood. It regains one expended charge.

Rare Variant. Whenever you expend a charge, you also gain an additional action you can only use to either make one attack with the weapon or take the Dash action.