This adds a treasure feature using the lootbag addon for the unity MMORPG kit package, turning a monster entity into a treasure chest.
To install follow the instructions here to install the loot bag addon
https://github.com/vaughanb/UnityMultiplayerARPG_LootBag
Then modify the treasure prefab with the model you like and place copies of it in the game and mosify the drop list where needed.
Also add the treasure data object to the game database.