This is one of those cases where there are three hostas with the same name. One is registered and, therefore, the "official" version of H. 'Wildfire' while the other two are non-registered plants and need to be renamed to avoid further confusion.

A seedling of H. 'Sea Prize', this cultivar was registered by Dr. Ed Elslager of Michigan in 1999. It is a small size plant with gold foliage which bears lavender flowers in July.

According to The Hostapedia by Mark Zilis (2009), "The plant currently being offered on the retail market is not this version of 'Wildfire', but Herb Benedict's plant." (see below)

Hosta Helper will call this plant 'Wildfire' (Elslager).
 

According to The Hostapedia by Mark Zilis (2009), Dr Ralph (Herb) Benedict of Michigan originated a bluish green hosta of Hosta longipes type which bore this name. He later changed the name to H. 'Benedict's Wild Fire' which was registered in 2010.

Hosta Helper will call this plant 'Wildfire' (Benedict).

According to The Hostapedia by Mark Zilis (2009), Doyle Woods of Iowa displayed a seedling with streaked variegation by this name at the 1997 Midwest Regional Hosta Society convention.

Hosta Helper will call this plant 'Wildfire' (Woods).