Panzerschreck Dragon

Overcharge - [AUTO](RC):When this unit attacks, if this unit was chosen by the ability of your grade 3 or greater vanguard with "Aelquilibra" in its card name this turn, [COST][Energy-Blast 3], and this unit gets [Power] +15000 until end of that battle. At the end of that battle, draw a card, and retire this unit.