Invisibility

Some champions have the ability to become invisible. Invisible units can do not appear until they have attacked, or the duration of their invisibility effect expires. For some champions, using an ability that will cause them to become invisible is preceded by period called a "fade time", during which the champion appears partially transparent, but is still visible to enemies. During this fade time, any damage taken by the champion delays becoming invisible for a short period of time. No matter how many times a champion is hit, however, the fade time on invisibility cannot exceed five seconds.

Invisibility detection: There are various ways for a champion to gain the ability to see invisibility. A champion with this ability will see invisible enemy units as partially translucent. When a revealed invisible unit leaves the revealed area that unit does not experience a fade time; the unit immediately turns invisible again. The following is a list of possible ways to detect invisible Champions:

• Vision Wards: Vision Wards can be purchased at the item shop. When placed on the ground these stationary wards reveal an area of the map for three and a half minutes. Any invisible enemy units who move through their vision radius during this time will be revealed.
• Oracle’s Elixir: A consumable potion available at the item shop that grants invisibility detection to a champion until death. Any invisible enemies enter this champion's vision range while this potion is active will appear be revealed.
• Champion Abilities: Some abilities, such as Corki's Phosphorus Bomb, Twisted Fate's Destiny, and Nidalee's Bushwack, can reveal invisible units for a short period of time.