Undead Unluck manga volume 13 features story and art by Yoshifumi Tozuka.

The envoys of God - Seal and the Negator of ruin, aptly named Ruin - are both making things difficult for Andy. Rip crashes the party, but his objective was to steal the right to board Ark all along! Meanwhile, a betrayal rocks the Union, bringing the headquarters to the brink of destruction!