"Cast your weapons at the Forsaken Tree, and let it release the evils of your past." - Persephone
In God of War: Chains of Olympus, Kratos encounters Persephone before the Forsaken Tree in the Groves of Persephone within the Underworld. It is depicted as a large tree with pomegranates growing on it. If he is to see his daughter Calliope in the Elysium Fields, he is told by Persephone to release the evils of his past into the tree, after which he will be allowed into Elysium.