Usage: {{User:Kaimbe/ItemIcon|ImagePath|ItemName|Rarity}}
Example: {{User:Kaimbe/ItemIcon|Gloves_of_Missile_Snaring_Icon.png|Gloves of Missile Snaring|rare}}
Result:
Suggested CSS style: .item-icon small rare {box-shadow: inset 0 0 .2em .1em #01BFFF, inset 0 0 0 .05em #01BFFF;}