Demonic Stone Dragon, Rockargour

[AUTO](RC)[1/Turn]:When this unit attacks a grade 3 or greater unit, if your soul has four or more cards with different grades, this unit gets [Power]+10000 until end of turn. [AUTO](RC):When you [Soul-Blast 4] or more cards at the same time for the cost of your vanguard's ability, if your opponent's vanguard is grade 3 or greater, [COST][Counter-Blast 1], and [Stand] this unit. (Usable only if you [Soul-Blast 4] or more at once)