Magic:Greater Magic Weapon

Transmutation
Level: Brd 3, Clr 4, Pal 3, Sor/Wiz 3
Innate Level: 3
Component(s): V, S
Casting Time: 1 action
Range: Touch
Target: Creature or melee weapon
Duration: 1 turn/level
Counter(s): --
Saving Throw: None
Spell Resistance: No
Metamagic: Extend, Quicken, Silent, Still
Energy Substitution: No

You empower the touched weapon with a +1 enhancement bonus per 5 caster levels (maximum of +5) with bonuses for militant levels. You can either directly target the weapon you want to cast this spell on, or you can target a creature, affecting the creature's main hand weapon.

Note: If cast on monks gloves it sometimes erases any flameweapon/darkfire applied. So if buffing monks it seems better to apply first Greater Magic Weapon and then Flameweapon/the like (will erase the damage bonus of GMW though).

Fighters who have a Weapon Specialization feat in the weapon being enchanted will receive an additional Massive Critical bonus based on their fighter levels. ONLY fighter levels will count towards this bonus. This bonus requires a minimum of 10 fighter levels. Epic Weapon Specialization gives a greater bonus.

Fighter Levels	Weapon Specialization Massive Critical Bonus	Epic Weapon Specialization Massive Critical Bonus
10-19	1d4	2d4
20-29	1d6	2d6
30-39	1d8	2d8
40	1d10	2d10