A new small event has popped up on the test servers! It’s called “Tavern Bargains”.
It lasts for 30 days and you’ll get rewards for summoning heroes in the noble tavern (excluding companion summons).
After accumulating more than 500 hero summons, there is a greater chance to acquire Signature Item resources and rewards from additional rewards.
Not sure when the event will go live, but If I had to take a guess it would be with the release of patch 1.22 next week.