X-BT01A-CP02/0004 Green Crystal Dragon, Chartreuse (RRR)
1[Call Cost] [Pay 1 gauge]
If you have an originally size 3 <Prism Dragon> on your center, reduce the size of this card on your field by 3.
At the end of the battle where your <Prism Dragon> was attacked, if there is a <Prism Dragon> on your center, deal 1 damage to your opponent. This ability only activates once per turn.