Mauve Heavenly Crystal Dragon, Athora Tanzanite (RRR)

This card's [Call Cost] is reduced by 4 gauge if you have used [Overturn] during this fight. [Call Cost] [Put this on top of a size 3 《Prism Dragon》 on your field & Pay 4 gauge] This card on the field cannot be destroyed and you cannot be dealt damage by card effects. During your opponent's turn, when you cast a spell, deal 1 damage to your opponent! [Penetrate] [Triple Attack] [Counterattack] [Soulguard]