You can Tribute this card and 1 Sea Serpent-Type monster; Special Summon 1 "Poseidra, the Atlantean Dragon" from your hand or Deck, then all monsters your opponent currently controls lose 300 ATK.
Near Mint Unlimited - $0.30
Near Mint 1st Edition - $0.40
Lightly Played Unlimited - $0.30
Lightly Played 1st Edition - $0.30
Moderately Played Unlimited - $0.20
Moderately Played 1st Edition - $0.30
Heavily Played Unlimited - $0.20
Heavily Played 1st Edition - $0.20