|Wild Card - Superb|
Multiplayer league reward
Festival Premium reward
According to the official announcement,
- “[e]ach Wild Card has its own rarity (Optimal, Prime, & Superb) and can be converted into any Festival Card of the same rarity from a Festival that has already ended. Wild Cards can also be used for any current/future Festival Cars in Asphalt 8, but only AFTER their Festival completion.” 
The Wild Card - Superb can be converted into any current or future Vehicle Kit card of superb rarity by choosing the "Convert" button after tapping on it in the inventory. Contrary to Gameloft's initial announcement, the conversion is not free but costs 100,000.
It also should be noted that despite the wording of Gameloft's announcement that Wild Cards can be converted into cards for Festival cars AFTER their festival completion, it may be some time before the conversions can take place. This does not appear to be a fixed period and may rely on a game update, or a number a festivals to pass before a Wild card can be converted for a recently completed festival car.
- Asphalt (2020-06-24). Festival "Wild Cards". Facebook. Retrieved on 2020-06-30.
- The original “What's new?” text as of June 24, 2020, contained the addition “for free”. As of June 30, 2020, “for free” had been removed. Gameloft SE (2020-06-24). Asphalt 8: Airborne: Fun Real Car Racing Game. Google Play Store. Retrieved on 2020-06-24. “Win them and convert them into the Kit cards for specific cars for free!”