Item Modifiers is a mod that is very much inspired by Terraria's modifiers system.

The modifiers the mod implements are below. By default, there is a 25% chance that an item will not have a modifier at all. This can be changed in the mod's config.

Universal

(all weapons can have these modifiers)

Keen - +3% critical strike chance
Superior - +1 damage, +3% critical strike chance, +10% knockback
Forceful - +15% knockback
Broken - -30% damage, -20% knockback
Damaged - -15% damage
Shoddy - -1 damage, -15% knockback
Hurtful - +1 damage
Strong - +15% knockback
Unpleasant - +0.5 damage, +15% knockback
Weak - -20% knockback
Ruthless - +1.8 damage, -10% knockback
Godly - +1.5 damage, +5% critical strike chance, +15% knockback
Demonic - +1.5 damage, +5% critical strike chance
Zealous - +5% critical strike chance

Common

(swords & ranged weapons)

Quick - +10% speed
Deadly - +1 damage, +10% speed
Agile - +10% speed, +3% critical strike chance
Nimble - +5% speed
Murderous - +0.7 damage, +6% speed, +3% critical strike chance
Slow - -15% speed
Sluggish - -20% speed
Lazy - -8% speed
Annoying - -20% damage, -15% speed
Nasty - +0.5 damage, +10% speed, +2% critical strike chance, -10% knockback

Melee

(swords, pickaxes, axes, & shovels)

Large - +12% size
Massive - +18% size
Dangerous - +0.5 damage, +2% critical strike chance, +5% size
Savage - +1 damage, +10% size, +10% knockback
Sharp - +1.5 damage
Pointy - +1 damage
Tiny - -18% size
Terrible - -15% damage, -13% size, -15% knockback
Small - -10% size
Dull - -15% damage
Unhappy - -10% speed, -10% size, -10% knockback
Bulky - +0.5 damage, -15% speed, +10% size, +10% knockback
Shameful - -10% damage, +10% size, -20% knockback
Heavy - -10% speed, +15% knockback
Light - +15% speed, -10% knockback
Legendary - +1.5 damage, +10% speed, +5% critical strike chance, +10% size, +15% knockback

Ranged

(ranged weapons)

Sighted - +1 damage, +3% critical strike chance
Rapid - +15% speed, +10% velocity
Hasty - +10% speed, +15% velocity
Intimidating - +5% velocity, +15% knockback
Deadly - +1 damage, +5% speed, +2% critical strike chance, +5% velocity, +5% knockback
Staunch - +1 damage, +15% knockback
Awful - -15% damage, -10% velocity, -10% knockback
Lethargic - -15% speed, -10% velocity
Awkward - -10% speed, -20% knockback
Powerful - +1.5 damage, -10% speed, +1% critical strike chance
Frenzying - -1.5 damage, +15% speed
Unreal - +1.5 damage, +10% speed, +5% critical strike chance, +10% velocity, +15% knockback

Disabled

(modifiers disabled by default)

Gigantic - +9 damage, -0.25 attack speed, -25% speed, +200% size, +200% knockback
Ungodly - +3 damage, +100% damage, +4 attack speed, +10% speed, +20% critical strike chance, +200% velocity, +300% knockback
Zoomy - +500,000% speed, -25% size, -10% knockback

As the mod is currently, the only way to obtain a modifier is to get a new item, however that is subject to change if/when I work on this project more.