Although the Power Rangers have been through countless adventures over the past thirty years, BOOM! Studios' Darkest Hour stands to be the worst of them all. On top of pitting the heroes against one another, the story has opened the door for the biggest villain in franchise history to threaten the Rangers' entire universe. Thankfully, the heroes have a way to fight back through Billy Cranston, aka the Blue Ranger.
Source：https://www.cbr.com/darkest-hour-power-rangers-icon-strength-boom-studios/
