Advanced format ruling
Orca Mega-Fortress of Darkness
Card effect (current official text)By Tributing 1 "Torpedo Fish" on your side of the field, destroy 1 monster on the field. By Tributing 1 "Cannonball Spear Shellfish" on your side of the field, destroy 1 Spell or Trap Card on the field.
Current rulings for this card are maintained by Konami.
Rulings data courtesy of Format Library — formatlibrary.com. Spotted an inaccuracy? Flag it in the Advanced forum — sourced change requests get reviewed.