 The search for new elementary particles is a fundamental pursuit in physics, ranging from subatomic physics to quantum materials. In particular, magnans are the ubiquitous elementary quasar particle to describe the excitations of fully ordered magnetic systems. However, other possibilities exist, such as fractional and multipolar excitations. In this study, researchers observed the spontaneous decay between conventional and heavy magnans and the recombination of these quasar particles into a super-heavy bound state. This phenomenon was similar to other contemporary problems in quantum materials, which were caused by the quasi-flat nature of excitation bands and the presence of ketiav and isotropic magnetic exchange interactions. This article was authored by Xiaojian Bai, Zhongshan Zhong, Hao Zhong, and others.