The Circle of Life is an achievement that requires the player to use pawya meat in a grenwall trap.
The pawya meat needs to be used on a box trap in a Hunter area in Isafdar. A grenwall does not need to be caught for the achievement to complete. A convenient Hunter area with both pawyas and grenwalls is located west of the Tirannwn lodestone, past the dense forest obstacle, it may be faster to trap the pawya at the magic trees (exit Lletya and head south), since there are no predatory grenwalls to kill them.
The Gorajo resource dungeon and Nyriki's private hunting grounds will not work.