[ACD] Superheavy Maju Kyu-B

(This card is always treated as a "Superheavy Samurai" card.)
This card can only attack the monster your opponent controls with the highest ATK (your choice, if tied). This card can attack while in face-up Defense Position. If it does, apply its DEF for damage calculation. This card gains 900 DEF for each Special Summoned monster your opponent controls.