Story
A demon called "Gravetender" was born from an angel who wished for eternal rest.
The demon lost its sense of self due to the pain, and its roots made it grow larger, transforming into an insect-like figure with hundreds of arms. Digging the soil and moving underground to find the remains of the creator. Only by destroying the remains can the demon's suffering end.
We mourn all those who have fallen before us, and ensure that they are properly mourned. However, it may just be marking the places you've already searched.