Fairy of Prospecting, Roallua

[AUTO](RC):When this unit attacks, if you have a grade 3 or greater vanguard with "Granfia" in its card name, [COST][retire a Plant token], and this unit gets [Power] +10000 until end of that battle. If your opponent's vanguard is grade 3 or greater, [COST][Counter-Blast 1], and this unit also gets [Critical] +1 until end of that battle.