Gives you 1 Ancient key.
Rewards from Ancient crate:

Gives you 1 Legendary key.
Rewards from Legendary crate:

Gives you 1 vote key.
Rewards from vote crate:

Gives you 1 VIP key.
Rewards from VIP crate:

Gives you 1 MVP key.
Rewards from MVP crate:

Gives you 2 Evolve keys.
Rewards from Evolve crate: