Able to make 1 of your opponent’s face-up monster lose ATK equivalent to the battle damage inflicted by another one of your monster.
Good ATK stats
Dependant on your other monster to inflict battle damage to your opponent, in order to trigger its effect.
Weak DEF stats.
You can use Moonlit Papillon to Special Summon this monster from your Deck to the Field.
Due to the immense effects of monster removal tech cards such as Treacherous Trap Hole and Widespread Ruin, which are widely used in the current meta, attack reduction strategies are becoming less effective.
Combine Swallowtail Butterspy with these monsters that can attack your opponent directly, to be able to reduce the attack of your opponent’s face-up monster.