幼い頃の約束 is a Weiß Schwarz card from PRカード【Wサイド】 ZM/W03-105. Compare listings from Singapore Weiß Schwarz sellers on CardJio, then jio them on WhatsApp.
【CONT】 All your Characters get +1000 Power, +1 Soul. (Book：When this card is triggered, you may draw 1 card)
This card was printed in Japanese only; the English text above is an unofficial community translation.