After getting Denethrir's weapons, they can do special effects. When you start getting Mokti's and Leirobas' armor, they can also do special effects. Below is a list of the abilities the items can do.
Denethrir's weapons
Volcano Wand: Lava Flow = 20 fire damage
Glacier Wand: unknown due to lack of use
Storm Wand: unknown due to lack of use
Mountain Wand: Absorbing Stone = unknown due to lack of use
Nature Wand: Spirit of Oak = 25 heal at random
Erick's Weapons
Fire Staff: Magma Burst = 40 fire damage
Ice Staff: Ice Shield = 10 damage to your opponent when it hits you
Shock Staff: Weakness = lowers opponents defensive ability
Spectral Staff: Rage of Light = increases your attack and defence
Life Staff: Spirit of Growth = 100 heal when casted but can only be casted for a short amount of turns
Mt. Fortress Weapons
Thunderstar Staff: Staggering Stun = 2 stun at random
Firedrop Staff: Blast Furnace = 30 fire damage for 5 consecutive turns at random
Iceheart Staff: Ice Wind = When activated, opponent gets stunned at random turns
Moonstone Staff: Spirit of Life = 45 heal at random. Also, when your Lupe is hurt, the staff will heal your Lupe for 4 hp per turn until the current hp is equal to its max. hp
Shadowgem Staff: Elemental Resistance = Works like Fortitude when activated
Mokti and Leirobas' Armor
Dawnshine Generator Shield: unknown due to lack of use
Sorcerous Robe: unknown due to lack of use
Mr. Irgo's Armor
Robe of Protection: It cancels out damage at random
Energy Absorber: It converts damage into health at random
Mt. Fortress Armor
Evening Sun Energy Shield: Whenever you get hit, your opponent take 20 damage
Inferno Robe: Whenever you hit your opponent, it does an additional X damage where X equals to a number between 1 and 10