It's a special map that will focus on exploring to find many items for a collection in addition to the usual objectives. The combat is balanced around not having attack speed, and provides the player with a full array of off hand items allowing to attack without restraint with some additional bonus. Progressing feels quite nervous due to having no delay in fights, as well as fast spawning and tough enemies, but it overall feels quite balanced(if you exclude axes completely overpowering swords in strength).
For the areas themselves, the start is fairly simple, but there is a strong use of verticality in the level design, making it less straightforward than you'd think. The second area is even more like this since it's atop spires. The third area starts with having to go over lava with some help, then continues through labyrinthic caves leading to the top of the mountain. Then, the final area brings heavy artillery with the toughest mobs I've fought in a while in a fairly linear fortress. It's a nice touch to give elytra to escape the place once conquered.
What to think? The terrain was hard to walk through, often uneven. I was a bit thrown off at first from the choice to eradicate swing time, but got used to it after a while. The custom items were really great and often worth using, but on the other hand, there was a lot(and I mean a lot) of normal loot handed out as well, which sadly was quite useless due to the custom loot lasting through the whole map. I didn't even bother opening my chests except when dropping off items. The optional collection room is amazing, I love the concept since I have a tendency to love museum stuff in games, so that's a huge win for me! Wish we'd see more of those...
So yes, great map, quite unusual compared to other CTMs, tense and fun combat, even hard at times!