In the arcade version of BlazBlue: Calamity Trigger, only three characters – Ragna the Bloodedge, Rachel Alucard, Nu -No. 13- – can use Astral Heat. In the home versions, other Astrals can be unlocked by beating Arcade Mode with specific characters other than the aforementioned three. Since the second game – BlazBlue: Continuum Shift – Astral Heats became available for all characters in the Arcade versions. Most of the commands have been changed. If the character's portrait is shining, it is the signal that indicates the Astral Heat can be used.