A Reward of an Encyclopedia is a Weiß Schwarz card from オーバーロード Vol.2 OVL/S99-021. Compare listings from Singapore Weiß Schwarz sellers on CardJio, then jio them on WhatsApp.
Card type
Event
Side
Schwarz
Color
Yellow
Level
1
Cost
0
Neo-Standard
Nazarick: Tomb of the Undead
Card Text
Put all cards from your hand into your waiting room, draw X cards, put the top card of your deck into your clock, choose 1 of your characters, and that character gets +1000 power until end of turn. X is equal to the number of cards put into your waiting room by this effect +1.