Special Efect items will be like eye candy to say.You could have a tab to use these items and see what they're affect is.
Ex:
SkyThorn Vine
Six Ameythest,Six Jade,Four Black Lotus,Seven Nightshade,and 20 Water lilies
When you use the vine it will make Vines go from the ground and Carry you ANYWHERE in the area and Jump over enemies
another
FireSmoke Stones
Twelve Rubies,thirty Stoneblocks,Four Black Pearls,Six Scrap Iron,and Two Bloodmoss
When you use it the entire area will then be filled with smoke and enemies will not go in the Duel ring when your in front of them since they cant see you.
Effect-Four Karhanan Guards go around you and wont let anyone go past them[The Buff Kroks with the two Sticks]
Sixteen Ametyest,Sixty Bones,Eigth Ancient Scrolls,and Four Nightshade [This is meant to be so Hard Its Four Krok Guards Following you for Two Hours!]
Also You can make Even More So Even More Kroks Follow!They Also Have Two Comands Spirit Strike[Jump in Air and Release Energy All of them] and Ghost Typhoon[A bunch of Ghosts Come out of the Ground and Form a Tornado].
:D