Jade Gem Crystal Dragon, Schartreuze (RR)

[Call Cost] [Put the top card of your deck into this card's soul & Pay 1 gauge] If you have an originally size 3 《Prism Dragon》 on your center, reduce the size of this card on your left or right by 3. At the end of the battle that a 《Prism Dragon》 monster on your field was attacked, deal 1 damage to your opponent! This ability only activates once per turn. [Soulguard]