Sanguis is a mod that adds Bleeding mechanic similar to one from Soulsborne games along with equipment that specializes in Bleeding.

How does Bleeding work

Bleeding is an effect that deals true damage (a damage that can't be reduced by ANY means including armor, potions etc.) when it reaches level 5. Applying Bleeding increases it level by 1 (or by 2 in some cases). You can tell what level of Bleeding mob has by observing how many special particles are surrounding it. For an obvious reason, some mobs are immune to Bleeding (undead mobs, golems etc.). When Bleeding effect activates, you will hear special sound. If YOU are the one with Bleeding, you'll be provided with a fancy overlay

How to get Unbound Blood

Unbound Blood is an essential item in Sanguis required to craft anything from this mod. You can get it either by combining crimson lily (you can get it by killing agressive mob while it is on block with a small flower growing), blaze powder, nether wart and iron nugget on crafting table or you can buy it from cleric for one ender pearl and one ghast tear

Sanguis adds various weapons, both melee and ranged (or semi-ranged). All of them not that impressive on their own but their power comes from Bleeding application and special abilities. Melee weapons always apply Bleeding on hit.

Aside from weapons, Sanguis adds some other equipment and enchantments focused on Bleeding.

Eye of Sanguinius

An eye from the golden armor of the Great Angel. When it is in second hand bearer of this artifact is cursed with unquenchable hunger that can only be stopped by attacking enemies affected by Bleeding. In return, when bearer replenishes their hunger with the help of this artifact they can also regenerate some of their health

Chant of Blood

A book full of arcane knowledge.. or just a cleric's cooking book, it is yet to decipher what is written in it. When it is hold in second hand bearer gains power to summon a bloody shades of slaughtered enemies. Tho those shades are not perfect copies of slayed monsters, they are still strong enought to protect bearer. They attack any nearby monster or anyone who tries to attack bearer (except other players)

Dr. Faust

A hat made of demonic remains, it possesses a power to deprive enemies of their blood. But for it is a demonic artifact, the one who wears that hat is also under it's effect so you should not be reckless while trying to collect blood of your foes. Michael Jackson not included.

Enchantments:

Rupture - an enchantment appliable to weapons. Weapons enchanted with it can apply Bleeding to attacked enemy, higher the level of this enchantment - higher the chance of applying Bleeding

Bloodlust - a curse appliable to weapons. Grants guaranteed application of Bleeding on attack both to you and attacked one

Bleed - an enchantment appliable to chestplates. You have 1 in 2 chance to negate incoming damage and apply Bleeding to yourself