I am a level 22 wizard. Just finished with Grizzleheim. When Merle Ambrose tells me to meet him, he doesn't end up giving me a quest like he is supposed to. What do I do?
You don't do anything; you cannot move on in Grizzleheim at level 22. Go back and do main storyline quests to advance in the game - Grizzleheim only leads to Wintertusk not other worlds within the spiral.
It lists all of the quests in Grizzleheim. You can click on a quest there to get more details on it.
As I mentioned, you get access to areas based on your level.
For example, you can go to Vigrid Roughland at Level 25, if you finished the previous area.
This might help too:
Quests to Return to Grizzleheim: Level 20 – Trade Voyage (go to Northguard and Savarstaad Pass) Level 25 – Lending a Paw (go to Vigrid Roughland) Level 30 – Full Grizzle Jacket (go to Mirkholm Keep) Level 40 – The King and I (talk to Valgard GoldenBlade). He gives you “The Bigger They Are” (go to Nidavellier to defeat Jotun)