Magic Weapon Modifiers

Elemental - charged with a specific element damage. Powerful ones gain ranged, elemental energy attacks and some gain alternative melee attacks as well.
Thirsting - More powerful but if it misses its target, it will strike its user instead
Focusing - Aids in Spellcasting
Vampiric - Lifestealing
Slaying - Banes Effective against certain creatures
Grave - Reduces Healing Effects on wounds it causes
Null - Damages MP
Draining - Damages SP
Seeking - Increases Aim
Swift - Attacks Faster
Powerful - More physical Damage
Penetrating - Can hit enemy behind attacked one
Cleaving - Can hit enemy next to attacked one
Protection - Adds armor or Dodge
Void - Damages HP, MP, and SP
Returning - Comeback when thrown
Dangerous - Increased Critical Chance
Deadly - Increased Crit Damage
Deflecting - increases chance of parrying and blocking
True - Dispels illusions
Dispelling - removed enchantments on those struck
=== Based on Element ===
Dazzling - Can create Blinding Light - Light
Phasing - Can ignore armor, less effective vs reflective. Deals reduced physical damage - Light
Illuminating - Cause target to glow - Light
Coiling - Can be used to ensnare - Wraps like Liquid Metal - Plant
Muddy - creates muck on targets, slows -Plant
Thorny - Causes bleeding - Plant
Freezing - Freezes - Frost
Chilling - Causes fear - Frost
Sonic - Deafening - Air
Galeforce- Blows knockback - Air
Shifting - Allows user to shadow step after hits - Shadow
Shadowed - Gets an additional attack with a shadow of the sword - Shadow
Frightening - Causes Fear - Shadow
Burning - Lights Foes on Fire - Fire
Exploding - Creates an AOE explosion on impact - Fire
Falling - Trips - Gravity
Rising - Forces target to float into the air - Gravity
Earthen - Bonuses underground - Gravity
Tazing - Stuns - Lightning
Shocking - Paralysis - Lightning
Charged - Can be held into the air to call down lightning to make more powerful -Lightning
Smoking - Creates blinding clouds - Miasma
Choking - Creates choking clouds - Miasma
Corrosive - Melts armor - Poison
Sickening - Makes target sick - Poison
Envenomed - Makes target take poison DOT - Poison
Necrotic - raises those slain as a loyal skeleton - Twilight
Invisible - Cannot be seen, harder to dodge and block - Twilight
Sleepy - Puts enemies to sleep - Twilight
Rusting - Degrades metal equipment - Steam
Gaseous - cannot be blocked or parried but deals no physical damage - Steam
Soaking - Drenches target in water - Water 
Drowning - Can be driven into the ground to liquefy it - Water
Aqueous - cannot be parried but deals reduced physical damage -Water
Petrifying - Turns flesh to stone - Earth
Dazing - Stuns - Earth
Molten - melts through metal - Lava
Engulfing - can be driven into the ground to create molten pool - Lava
Blasting - can shoot out a plasma shot - Plasma
Neon - Causes target to glow radioactively - Plasma
Branding - Scars the flesh and deals increasingly more damage - Hellfire
Balefire - Deals tons of damage but also damages user - Hellfire
Blazing - can create an area around user that damages - Sun
Starcalling - Causes a star to fall after a short delay on target - Sun
Solar - Bonuses in sunlight - Sun
Flowing - lets user shadowstep - Mist
Phantom - creates false copies of user - Mist
Shattering - Does more damage against materials, can break shields and armor - Sand
Grating - sandpaper causes bleeding - Sand
Dusting - causes small sand storm that can be blinding - Sand
Shimmering - Confuses enemy - Moon
Lunar - Bonuses in moonlight - Moon
Celestial - Bonuses in Moon+Sunlight - Moon+Sun
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Bows
Spread Shot xYZ - Arrows split into Y parts in Z pattern
Bouncing Arrows
Trans Arrows - Ignore First target hit
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Intelligent
Speech - Includes Intelligence
Sense - Can feel or detect things
Skill - Can fight on its own
Singing
Materials
Damage Types