Path of Exile’s latest expansion, Sentinel, is already available on PC, and the core mechanic of the accompanying Challenge League are customizable sentinel orbs that follow you to fire beams of magic at enemies. But Sentinel isn’t meant to make life easier for players. It’s actually quite the opposite. They will bring more hard challenges for players. So players had better prepare enough POE Currency to strengthen themselves.

In the Sentinels Challenge League, players will find three types of sentinels scattered around the Wraeclast. Once they get into combat, the stalker sentinels will repeatedly fire monster-boosting beams. The Pandemonium Sentinel fires a massive explosion that empowers monsters in a large area. Then there are apex sentinels, which will only charge up rare or unique enemies.

Sentinel only works for a limited time and eventually runs out of battery. It can combine a depleted Sentinel with a Power Core to create a new, fully charged Sentinel that has the characteristics of each Sentinel shell used in its construction. Players can further tweak the Sentinel’s behavior using the Sentinel controller, which Grinding Gear Games calls “like a runic circuit board.”

Once players equip their Sentinels with the correct mods, the monsters they grant will drop tastier and rarer rewards. There are also some unique Sentinels to discover, with their own effects to experiment with and tinker with. The Sentinel expansion also adds 20 new keystone passives to the Atlas tree, meaning players will have more control over the Path of Exile endgame. This includes access to six new “uber” versions of pinnacle boss battles, which Grinding Gear Games says are the toughest additions to the game. And if players want to be smoother, they can buy some POE Currency on POECurrency. Come together!