Babs Seed is becoming a Cutie Mark Crusader just as she did on the show. The design overlaid on top references the three starting Cutie Mark Crusaders. The card's info says:
RB10-EN047:
Cutie Mark Crusaders Ceremony
Normal Spell
When you control "My Little Pony Apple Bloom", "My Little Pony Scootaloo", "My Little Pony Singing Sweetie Belle" and "My Little Pony Babs Seed": This turn, they are treated as "My Little Pony Cutie Mark Crusaders" monsters, also their ATKs become twice their original ATKs.
Common