How does soulbound work?

How do I know if I will get a white bag or something soulbound from a boss? Is it a set amount of damage you have to do to the enemy, or does it vary with the amount of players in a said realm or dungeon?
I've gotten white bags from Deadwater Docks before, but at some point I did more damage but didn't get a white bag.
Best Answer
This gets asked a lot.
It is not something published by DECA and it is more of a speculation and a lot of tests from different players but it looks to be related to the damage done and number of players in most cases
I think the most comprehensive answer (list of theories) you can find is here: https://www.reddit.com/r/RotMG/comments/46or1f/how_does_the_loot_system_work/
inside ROTMGBotzilla post
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Do both creatures have to have Soulbound?
Each soulbond can only have 2 creatures in it. If both creatures have a soulbond ability, they will both get their own and the ability of the other one. If you soulbond Elgaud Shieldmate and Diregraf Escort, both of them will have Hexproof and Protection from Zombies. Neither of them can soulbond with other creatures.Can you respond to Soulbound?
As before, your opponent can respond to the trigger, but once the trigger begins to resolve, he or she will have to wait until after the trigger has resolved and the "pair" created.Can you Soulbound multiple times?
NO. You may only pair when either enters the battlefield. They remain paired for as long as you control both of them. another unpaired creature implies the creature with soulbound must also be unpaired.What does Soulbond mean?
soulbond (plural soulbonds) (fandom slang) A fictional character to whom an individual forms an emotional attachment. quotations \u25bc (fandom slang) A deep, lasting emotional or spiritual connection between two characters, typically of a psychic or magical nature.Soulbond Judge's Corner #12
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