At the time of writing:

Each invitation costs around 10 Chaos Orbs for standard trading.
In higher-tier markets, prices spike to Path of Exile 2 Currency 20 Exalted Orbs, depending on supply and demand.

If you're aiming to push into the Abyssal Lich Ascendancy quickly, buying may be worth it despite the steep cost.

How to Use Kulemak's Invitation in Path of Exile 2

Once you've secured the invitation, it's time to put it to use. The process is straightforward but comes with high stakes.

1. Place Kulemak's Invitation in your inventory.
2. Travel to the Well of Souls.
3. Interact with the new option at the well, located beside the feature that reveals Desecrate mods on items.
4. Confirm the interaction, and your character will jump into the Well of Souls, transporting you to a new area: the Black Cathedral.

The invitation is consumed upon use, so make sure you're fully prepared with upgraded gear and buy Path of Exile 2 Currency for flask, gear, and map investments before activating it.

The Vessel of Kulemak Boss Fight

Inside the Black Cathedral, you'll face the Vessel of Kulemak, a unique Pinnacle Boss that serves as both a test of skill and a gateway to some of the game's best rewards.

At first glance, the fight feels like a standard endgame encounter, but there's a hidden twist:

After the initial victory, you'll be given a choice-claim your loot and leave, or revive the boss for another fight.
You can revive the Vessel of Kulemak up to four times.
Each revival adds a new modifier to the fight, stacking difficulty but also scaling the rewards.

This risk-versus-reward system makes the invitation incredibly valuable for POE 2 Currency for sale players willing to push themselves. The longer you stay in the fight, the more powerful your loot and Path of Exile 2 Items become.