Since big explosions here, are common, sure to be entertained with a Charged Blast.
Big explosions wipe out the smaller targets, and make Big Bosses weep!
Usually after receiving massive damage, Bosses tend to change their attack style.
And when multiple targets are difficult to aim for, explosive blasts can do them in a hurry, and then it's on to the next one!
There is also a signal, that informs when the next Explosive Blast is ready to charge.