Here's the MMPR listing:
MIGHTY MORPHIN POWER RANGERS #21
Publisher: BOOM Studios
Retail Price: $3.99
Writer: Kyle Higgins
Artist: Hendry Prasetya
Main Cover: Jamal Campbell
Connecting Variant Cover: Steve Morris
Variant Cover 1: Dan Mora
Variant Cover 2: Miguel Mercado
Action Figure Variant Cover: Quest Matthews-Martial
The secret history of the true original Power Rangers divides the Mighty Morphin team, and only Zordon can save them.