Mayel The Cruel
Mayel The Cruel is the boss of the tier 1 dungeon The Bandit Trove. It is a dungeon located by the stonehenge where Mitsuki The Dominator spawns. You need to push the one of the levers on the pirate ship to challenge him.
Mayel's AI is like a regular t1 elite, except for that he spawns t1s and t2s when hit. He will shoot at you at all times.
When Mayel is killed, he either drops a bow or a piece of leather armour. He also drops around 4 stacks of gems. There will also be a message saying "Mayel The Cruel has been slain by a group of adventurers" for everyone on the shard that you killed him on to know that you and someone else, killed Mayel.