The 3 most annoying bugs or issues you are currently experiencing:
1 - There's no way to buy mercenaries in high-level group missions.
2 - There's no equipment to upgrade at high levels.
3 - Please fix the 5-minute duel return time so we don't waste gems, which are so necessary for missions.
and 4 -Please fix and balance the tournament ranks
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Knights who have been playing since the beginning of BK, have too much Constitution (as well as the rest of our stats) to participate in War Orders. We're forced to avoid participating to wars for absorbing too much damage.
Karma: We're forced to switch to Dark Karma to face War duels. Only Acid has that advantage, and it's unfair to those with positive Karma. Currently, only Acid is valid in War Orders; Neither a hit is given nor received.. Besides, if your life at war is, for example, 8000, an Acid hit does to me 10000 - 13,000 of damage, which isn't even realistic. The wars now are absurd.
Potions are also ridiculous at mid-to-high levels. We're forced to constantly buy 10-gem potions, or we can't play when we're attacked every hour.