Taste of Happiness, Mash (FGO/BSF2021-01 PR) [Bushiroad Event Cards]

[CONT] During the attack phase, you cannot return characters from your waiting room to your hand by your card's effects. [AUTO] When this card becomes [REVERSE] in battle, if you have 1 or less other "Chaldea" or "Babylonia" characters, put this card into your clock.