My guild in Splinterlands finally upgraded the store building to level 2 which meant I could buy Gladius packs. You need to be in a guild to get Gladius packs and that guild need to have arena at level 1 and store at level 2.
To get Gladius packs you need merits which are earned through winning brawl battles.
Each Gladius pack contains five cards, Each pack has a minimum of 1 rare and 4 commons.
Gladius cards can not be sold or transferred to other players.
This is a short video of me opening my first 2 Gladius pack.