How to Use the Mirror of Path of Exile 2 Currency Kalandra in PoE 2
Using the Mirror is simple:

Right-click the Mirror of Kalandra in your inventory.

Left-click the item you want to copy

This will instantly create a mirrored duplicate of the original item in your stash. The mirrored version is bound- you can't change it, but you can equip or trade it (unless league restrictions apply).

When Is It Worth Using?
This is where things get tricky. Since Mirrors are so rare, you don't want to use one on anything less than god-tier. Here are guidelines for deciding:

Mirror an item if:
It's perfectly rolled with best-in-slot affixes

It fits into multiple endgame builds
It has meta-defining influence (e.g., high %Crit, +Skill Gems, high Resists, etc.)
It's crafted through multi-exalt investment and is not easily replaceable
Don't mirror gear that: easily outclassed by newer drops or patches
Has mediocre rolls or poor synergy

Will likely become obsolete in a few levels

Pro Tip: It's common practice to mirror top-tier items created by the crafting community- many players mirror-trade in mirror services, offering access to their best gear for a fee.

Closing Thoughts: The Ultimate Trophy
The Mirror of Kalandra is more than just a POE2 Currency- it's a trophy. For some, it's the final chase item of an entire league. For others, it's a wealth token used for poe2 trade site massive trade leverage. In Path of Exile 2, it retains its legacy as the pinnacle of drop rarity and item crafting.