Well this is basically stolen from a different game but I found it to be really fun so I am going to suggest it on here. Basically a new PvP mode but it is played out in the clockworks instead of the Arena. Tired of the monotony of the clockworks, the knights have cooked up a new challenge for themselves. Groups of knights who are very confident in their skills and teamwork can turn on the option for another groups of knights to invade their party. The second group are not there to help though! They will try their very best to eliminate the first group and take over their dungeon.

Rewards for each group:
In order to invade another group's dungeon a crown fee must be paid (in lieu of energy). This fee will go to the group that prevails in the end. If the invaders manage to kill the original group, they get to continue on and do the rest of the depth and any after that themselves, and the original group will get booted back to haven.

If any monsters are killed while both groups are present, the drops will only be visible to the group that dealt the killing blow. Same with treasure boxes and any other loot. Also both groups must be the same size in order for invasion to occur.