[Discussion on Discord](https://discord.com/channels/378908274113904641/402213035865014272/1341187205942476861) - The maximum stack limit before the mass kill penalty is 10. - The Palace grants +20 to the maximum stack limit. - The number of killed units is `sqrt(# units on tile - max stack limit)` rounded down. - Units to be killed are selected at random from all units on the tile. - A notification message is sent out to the owner and attacker when this occurs showing how many excess units died.