Got the achievement although wondered what was going on! It was only at the end when was being nosey about a sudden influx of players on the same mount, that googled the mount and went ahh!
I clicked a blue orb thing out of curiosity, achieved nothing, flew away to do some world quests, came back to valdrakken and it gave me the achievement.
I got it without even doing anything, lol. I was just AFKing in the crafting area. Saw it mentioned elsewhere and was like “What’s this then?” and opened up achievement tab and I had already obtained it, when I was AFK.
To obtain the Feat of Strength Arcane Influence, you must participate in one of the remaining Empowering Forge events by at least touching one of the Power Source orbs scattered around Valdrakken during the event and staying nearby once the Forge is activated. The forge will be disturbed once every 4 hours and will become permanently empowered after 6 power-ups.
Randomly got this achievement for teleporting back to town interacting with a random power node in the central square… didn’t even know what it was. XD