Trove

Challenges appear in the top right corner of the screen at that the start of every hour and last for 20 minutes, you have to be mastery level 10 for these to appear.

These challenges require you to complete dungeons in specific biomes and have three tiers:

Tier----------Points Required------------Reward

1---------------------5----------------1 dragon coin
2--------------------40---------------2 dragon caches
3--------------------99---------------2 dragon caches


For the achievement you have to complete 10 of these challenges.

To get these points you need to complete dungeons in the biome that the challenge states, you get 1 point per dungeon but this is multiplied depending on the difficulty portal you compete the dungeon in and if you use the bonus classes specified.

Multipliers Table

Requirement-----------------Multiplier W/O bonus class
Uber-5 Adventure World-----------------x3
Uber-6 Adventure World-----------------x4
Uber-7 Adventure World-----------------x5
Uber-8 Adventure World-----------------x5
Uber-9 Adventure World-----------------x5

Requirement-----------------Multiplier With bonus class
Uber-5 Adventure World-----------------x9
Uber-6 Adventure World-----------------x12
Uber-7 Adventure World-----------------x15
Uber-8 Adventure World-----------------x15
Uber-9 Adventure World-----------------x15


Please note that you only need to complete the first tier for this to count towards the achievement

I hope this helps, please leave any improvements in the comments before voting negative.

Thanks

Challenges appear at the start of every hour. It will tell you to complete 5 dungeons in a certain place. Complete 5 dungeons and challenge will be completed do this 10 times and the achievement is yours.

These start at the beginning of every hour and go for 20 minutes.
You need to be level 10 to do these.
OK, there are several things that make this achievement really annoying. The first is actually finding the area that they are. I'm not sure of all them, but I'll list the ones that I found. I've traveled as much as 5 minutes searching for these areas. So if you zoom all the way out from the map ( Click the right stick, if your in motion the map will stay there. If you're stopped, as soon as you move the map disappears in case you didn't know. Zoom in and out with LT and RT)


Candiria is pink with Candy canes
Fae wilds ( can also say forest, Fae is what you're looking for) Green areas with butterflies.
Permafrost is white
Desert is reddish with cactus's.
Dragonfire peaks is brownish
Neon city is really dark with these little lines with tiny circles at the end. ( not sure what else to call it)
Cursed vale is purple with sort of a big square skeleton head(?)


There's probably more, that's just what I remember. If you see more, let me know and I'll post them.
I always did these at a lower level than the suggested level for the area, so if you are level 18 I did the level 15-17 and so forth to make it easier and faster.
These things are a pain to find at times too. They are usually high or low. The first thing I try to find is an oval with a pinkish/purple ring around it. That can skip a lot of the area.
I usually ride my mount ( mine is a horse, not sure what all the mounts are) past most enemies to find the boss.
When you get into the castle ( I don't do the big castles cause they take too long, but I think you get credit for 3) look for either a stairway or a hole in the floor. You'll most likely be dodging enemies attacking you.
All I did was kill the boss or did the cursed skull thing, grabbed the loot, although you don't need to, and left through the oval that brings you to the beginning of the area.
Every once in a while if I was at a really high place, the boss would fall to the ground, if that happens, jump off too and get him.
I never did more than the first levels 1-5, if you do the 1-40 this may count as 2, not sure.
Bit of a grind, not too hard though.