Curse of Thirst

I’m in the process of going through Shadowlands. Not really enjoying it much, but I’m doing this to acquire the battle pets.

And some of the pets available through the Kyrian covenant involve certain achievements, like “Curse of Thirst.”

I’ve been trying to look up the Trial of Wisdom (which is how you get this achievement) on Wowhead, but the only thing I can see being discussed is how people do this Trials once they have them, not explaining how you even get these Trials in the first place.

Can someone help me out? How do I even get these Trials I need?