ESCRT-III-like protein required to recruit the ESCRT-III complex to the nuclear envelope during late anaphase (By similarity). Plays a role in regulating nuclear envelope (NE) morphology and nuclear integrity, particularly during spindle pole body (SPB) extrusion or insertion through the NE, and perhaps during karyokinesis (PubMed:28242692). Suppresses slow growth rates of spores and severe nuclear envelope (NE) morphology defects of vps4 mutants. Belongs to the SNF7 family.