After being injected with strong Dying Will Flames, Roll can form an airtight sphere around a target to trap them. It is made of compacted Cloud Flames and the inside of the sphere has the ultimate power of isolation. The sphere can only be broken by strong Flames such as Tsuna's Hard Sky Flames. Because it is an airtight sphere, the oxygen level inside is limited. Persons trapped inside only have a limited amount of time to escape, before passing out or dying of asphyxiation.