Galaxy Tyranno (MP15-EN003) - 2015 Mega-Tins Mega Pack 1st Edition

When a "Galaxy" monster you control is targeted for an attack: You can Special Summon this card from your hand in face-up Defense Position. When Summoned this way, you can: Immediately after this effect resolves, Xyz Summon 1 "Galaxy" Xyz Monster, using only "Galaxy" monsters you control.