Killer Iceberg「殺しの氷山, Kirā Aisubāgu」: Gustaf creates a number of large icebergs and launches them at the enemy in a devastating barrage.
Blizzard Axel「吹雪乱舞, Burizādo Akuseru; literally meaning "Blizzard Wild Dance"」: A violent blizzard forms around the opponent and rips them apart with its destructive, icy winds. The technique takes a toll on Gustaf's body, and he was left weakened after using it while already severely wounded.
Freezing Field「フリージングフィールド, Furījingu Fīrudo」: Gustaf is able to freeze everything within a certain radius.
Gustaf using Killer Iceberg and Blizzard Axel against Hendrickson
Gustaf using Freezing Field
The "Blizzard Axel" technique is a reference to Nakaba's previous manga of the same name.