killed him with 3 people who had already killed him, 2 people have not. No mount. Does it only drop if all 5 players have not killed him?
It's 20% chance per loot eligible player.
It basicaly goes like this, if the internal roll would award the mount to someone lot locked that person simply does not get the mount and so no mount drops, therefore for each person loot locked theres a 20% chance of no mount dropping.
Suppose the system has a double roll. First it rolls for a chance of mount for a party (x20% for every not loot locked). If roll is successfull then it rolls second time who gets the mount. So it's not actually one roll of 20% chance for each eligible player. If it was like that there could be more than 1 mount per group which I haven't seen anyone mention so far.
yes .Does it only drop if all 5 players have not killed him?