Path of Exile: Lake of Kalandra expansion has you fight reflected monsters for loot

pcinvasion.com:

There’s a unique item in Path of Exile that has left fans with a particular question. The Mirror of Kalandra is a rare piece of currency, allowing players to create a mirrored copy of an item — as said in its description. But who is Kalandra, the name of the person attached to the Mirror? That’s a question developer Grinding Gear Games will answer in the next Path of Exile expansion, Lake of Kalandra. However, the studio won’t stop with relieving you of that burning question. Path of Exile: Lake of Kalandra brings a new area with creatures to fight, loot to gather, changes to the endgame, and more.

The expansion runs the gamut of what to expect from the studio and the game. More items are on the way, a class is getting balanced, the endgame is getting improved once more, and there’ll be new skill and support gems to play with. The expansion also revamps some rare beasts. As usual, there’s just too much the expansion will bring to Path of Exile, so I’ll sum up Lake of Kalandra as best as I can.

The standout is, of course, the new Challenge League. Lake of Kalandra will allow you to go to the mysterious, eponymous region to fight “reflections of Wraeclast” — reflected monsters of the PoE world. You can customize the Lake encounters, changing difficulty and more, using Mirrored Tablets you find while exploring the world.

These Tablets let you make choices on what kind of encounters you want when you visit the Lake. Later, you can even choose to exile, skip, or reroll choices. The endgame will let you save a customized Tablet as an item, which you can carry with you and trade.

Completing a challenge lets you pick an item to “reflect.” By that, I mean placing an item in a box will mirror (thematic) its stats, reversing them