Betterman Pondus is a form of Betterman used by Hiiragi and Pakila that uses gravity and antigravity as its weapons. By manipulating gravity, Pondus can create micro black holes or slow down time for its target using gravitational time dilation Hiiragi transforms into a shape described as resembling a Möbius strip, while Pakila transforms into a glowing version of himself.
Concept art of Hiiragi's Pondus
Ditto
Hiiragi's Pondus as it appears in the Hakai-oh manga
Pondus when used by Pakila