I think I've found it!

Description

This is a Climax card that interacts with deck revealing when played to the climax area. If the revealed card is a Fleet Girl character, it lets you give one of your characters +1 soul until end of turn, providing a temporary damage or trigger boost in attack turns. This Climax card is from a 2018 Weiß Schwarz booster expansion that added KanColle characters and supporting cards themed around reinforcements arriving from European waters.