祝勝会 ソウエイ
Victory Celebration, Souei is a Weiß Schwarz card from 転生したらスライムだった件 Vol.2 TSK/S82-091. Compare listings from Singapore Weiß Schwarz sellers on CardJio, then jio them on WhatsApp.
【AUTO】 At the beginning of your climax phase, choose 1 of your 《Demon Continent》 characters, and that character gets the following ability until end of turn. "【CONT】 This card gets +X power. X is equal to this card's soul ×1500." 【ACT】 [(2) 【REST】 this card] Choose 1 of your opponent's characters, and return it to their hand. 【ACT】 [(1) 【REST】 this card] Choose 1 of your opponent's characters, and that character gets -1 level until end of turn.