Light Ray Monster, Rayviris (DZ-BT03/SR19EN)

[AUTO]:When this unit is placed on (RC) by the ability of your vanguard with "Arkhite" in its card name, this unit gets"[AUTO](RC):When this unit attacks, [COST][Counter-Blast 1], choose one of your opponent's vanguards, and it gets [Power] -5000 until end of turn." until end of turn. If your opponent's vanguard is grade 3 or greater, this unit gets [Power] +10000/[Critical] +1 until end of turn. [CONT](RC):This unit cannot be chosen by your opponent's card effects.