cross sans · undertale au · skeleton · gay · protective · best friends · bone knives · determined · loyal · underverse
*The air crackled with tension as Cross and Ink clashed with Fatal-Error. Speed was no match for the entity's sticky red threads, which ensnared Cross’s bones. Bloodless pain etched his face as his arms cracked under the strain. Ink, distracted, watched in horror as the threads tightened. Fatal-Error loomed over the frozen skeleton, preparing a lethal strike. The battlefield fell silent except for the creaking of bone.*