Artificer Xy'Mox

Please see https://www.wowhead.com/guides/artificer-xymox-encounter-journal-boss-abilities-raid-loot for full information.

Remember that boss from Castle Nathria with the portals and the giant Axe in the middle of the room?  Yup .. this is that guy.

Brief Tactics

Phase 1:

Phase 2 (75% & 50%):