Petit Milim is a Weiß Schwarz card from 転生したらスライムだった件 Vol.2 TSK/S82-103. Compare listings from Singapore Weiß Schwarz sellers on CardJio, then jio them on WhatsApp.
Card type
Character
Side
Schwarz
Color
Red
Level
1
Cost
0
Power
5000
Soul
1
Traits
Demon Continent, Demon Lord
Neo-Standard
That Time I Got Reincarnated as a Slime
Card Text
【AUTO】 When this card attacks, choose 1 of your other 《Demon Continent》 characters, and that character gets +X power until end of turn. X is equal to the number of other 《Demon Continent》 characters you have ×500.