Corrosive Flail

Corrosive Flail is a rare +1 Flail that grants a special weapon action, Corrosive Strike.

Acid was long ago abandoned by assassins, who found poison much more reliable in spiking their target's drinks. The acid kept melting the chalices.

Properties

Damage: 1d8 + 1 (2~9) + Strength modifier ⁠Bludgeoning
Details:  Flails;  Rarity: Rare; Enchantment: + 1;  One-Handed;  Dippable; Consumable by  Gale;  Melee: 1.5 m (5 ft);  Weight: 0.9 kg (1.8 lb);  Price: 310 gp; UID
MAG_Corrosive_Flail

UUID
0a44de18-b355-4692-9256-d920b9bb25b7

Stats
MAG_Corrosive_Flail

The holder of this item gains:

Main Hand Only

Tenacity: When you miss a melee attack, you deal Strength Modifier⁠⁠Bludgeoning damage (minimum of 1) anyway.

If you have proficiency, equip in main hand to gain:

 Concussive Smash (): Hit an enemy with all your might to deal damage and possibly  Daze them. ( Recharge: Short rest.)

 Weakening Strike (): Target an enemy's hands with a non-lethal attack and possibly inflict  Weak Grip. ( Recharge: Short rest.)

This weapon also grants the following:

 Corrosive Strike (): Deal additional ⁠Acid damage equal to your Proficiency Bonus. On a hit, create a pool of acid around the target which reduces  Armour Class by 2. ( Recharge: Short rest.)

Regarding Tenacity:

If a weapon action misses, using Tenacity does not trigger its effects.
As Tenacity deals weapon damage even if an attack misses, it can trigger many on-hit effects from equipment. For example, from the  Gloves of Power, the  Callous Glow Ring, weapon coatings, or any infusion from the  Ring of Elemental Infusion.

Regarding Corrosive Strike:

This action is actually an AoE attack. After striking the main target, an additional attack is made against every creature and object within the 1.5 m (5 ft) surface radius around that target, including allies. Additional acid pools are then spawned for each creature and object struck this way.

When dual-wielding a flail or morningstar with a non-Tenacity weapon using the  Dual Wielder feat, Tenacity can be triggered by missing an attack with the non-Tenacity weapon, dealing ⁠Bludgeoning damage regardless of the weapon used.
- Some non-Tenacity weapons can trigger their on-hit effects via Tenacity as well, such as the  Ritual Dagger and  Loviatar's Scourge.

Regarding Tenacity:

As  Horde Breaker (Melee) rolls invisible, zero-damage weapon attacks against all enemies in the Horde Breaker area of effect, Tenacity can be prompted to trigger against them even if the first attack hits. It is therefore possible to score 2 hits in one attack: the full attack against the original Horde Breaker target and a Tenacity hit against another target.