Privateers event:
It is a special game event. During this event you can hire heroes of other players and rent out your heroes.
The event starts at a random time.

Rules of renting out:
You can rent out a restricted number of heroes with full stamina. The stamina restricts the number of times the hero can be hired.
The price for the hiring can always be adjusted during the event.

The rules of hiring:
A player can have a restricted number of privateers. The restriction can be different for each launch of the event.You can hire any heroes, including heroes which are already in your collection. The hired hero has a timer. When the time runs out the hero disappears from the collection.
You can’t use the same privateers in the battle. Also, privateers can’t be upgraded and you can’t ask cards of a privateer in a clan.

Market structure:
The market has several tiers divided by hero power, also there’s a special tier for Privateers of your clanmates.