Sneak attack
The Default range (to be honest i dont remember if this was the default or not) is 3 blocks when this mod is enabled. Upon crouching, you will gain one block of extra attack range, this does not apply to mining blocks. This does not have any drawbacks besides the fact that you are crouched.
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Dive attack
This is an elytra attack that when elytra flying, you get an extra damage and knock back boost.
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Obstructing
This enchantment, limited to swords, allows sword blocking to take place.
Depending on the tier of sword, you will take less damage when crouching when you have this enchantment.
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Ramming
Ramming is a shield only enchantment that can be used to unlock the shield ramming attack, when you have one enchanted shield in your mainhand with ramming, you can crouch to do a shield ram! When you preform this attack, you will have 10 attack damage, a speed boost, but increased exhaustion. If you preform a critical hit, you can one hit basic mobs!
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Twin Hold
This enchantment allows dual wield attacks.
When you have two weapons, (any weapon can have this enchantment, even modded ones), you can preform dual wield attacks. When you have two twin hold swords, you do +6 attack damage, and you attack with your offhand as well! Neat!
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Trident changes
Tridents are now craftable with 3 trident blades and 2 prismarine shards.
Elder guardians now drop trident blades.
Trident blades is an item.