Enjoy Path of Exile‘s Bestiary League while you can, because it won’t be around forever, and chances are you’ll never see it again.
Grinding Gear Games took to the forums to announce today that the Bestiary mechanics in the Bestiary League would not be integrated into the core game.
Why? Not only did the mechanics take a bit of work to implement, but they’d continue to take a bit of work to maintain as the game continues to grow. That, and since Bestiary is such a different aspect compared to the main game, Grinding Gear would want to add tutorials and such for new players, meaning even more work.
Finally – while Bestiary probably won’t be seen again, they say that they may repurpose parts of it for later additions to the game.