Steven Universe Ongoing #21 Boom publisher Pages: 24 2018 year English comics Size: 25.5 mb. Tags: Steven Universe Ongoing Steven Universe Ongoing Boom Boom studios Watch online Steven Universe Ongoing #21 or download Related comics: Steven Universe Ongoing #3 Boom Steven Universe Ongoing #2 Boom Steven Universe Ongoing #1 Boom Steven Universe Vol.1 Boom Steven Universe - The Greg Universe Special Boom Comment Type the two words shown in the image:* Send