Strong Fortress Dragon, Gibrabrachio

[ACT](RC):If your vanguard is "Heavy Artillery of Dust Storm, Eugene", [COST][Soul-Blast 1 & Rest] this unit], choose one of your opponent's rear-guards, and retire it. [AUTO](RC):At the beginning of your battle phase, if your opponent has one or less rear-guards, [Stand] this unit, and this unit gets [Power] +5000 until end of turn.