Blast, Mad Blast, and Fiery Blast are a series of Mars attack Psynergy featured in both games. It is available to the Swordsman (Mars) Class series and Dragoon Class series, making it usable by the Venus Adepts Isaac and Felix, the Mars Adepts Garet and Jenna, and the Mercury Adepts Mia and Piers.
"Blast" is also the name of the first Psynergy in the Blast (Nova) Psynergy series.
Blast: "Attack with an explosive blast.": This costs 5 Psynergy Points, has a base power of 25, and has a range of three targets. A small explosion of fire occurs at the feet of the enemy party. It is available at level 2.
Mad Blast: "Attack with an explosive blast.": This costs 9 Psynergy Points, has a base power of 50, and has a range of three targets. A moderately large explosion of fire occurs at the enemy party's position. It is available at level 10.
Fiery Blast: "Attack with an explosive blast.": This costs 19 Psynergy Points, has a base power of 110, and has a range of five targets. A large explosion of fire, spreading many embers, occurs at the enemy party's position. It is available at level 28 for the Swordsman class series and at level 27 for the Dragoon class series.
In the Swordsman Class series, this move is the only multi-target offensive Psynergy available, making it literally an unavoidable choice if the player is in that class and wishes to attack more than one enemy through Psynergy. In the Dragoon series, a more powerful and expensive alternative exists in the Nettle Psynergy series, however, if the player wishes to use a Mars-based Psynergy (for example, if they have the Big Bang Gloves equipped), then Blast again is the only choice. Thus, if the player is in a class that can use this Psynergy series, and wishes to use Psynergy offensively, then it is almost certain that they will utilise Blast.