Shadow-Mech Fortress

Name: Shadow-Mech Fortress

Attribute: DARK

Type: Machine/Effect

Level: 8

ATK/DEF: 3500/2000

Lore
Once per turn, you can Tribute one "Shadow-Mech" monster you control and destroy all monsters your opponent controls whose original ATK is less than the ATK of the Tributed monster and inflict 800 damage to your opponent for each monster destroyed.