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.
NM-Mint Unlimited - $0.25
Lightly Played Unlimited - $0.23
Moderately Played Unlimited - $0.20
Heavily Played Unlimited - $0.17
Damaged Unlimited - $0.13
NM-Mint 1st Edition - $0.40
Lightly Played 1st Edition - $0.30
Moderately Played 1st Edition - $0.30
Heavily Played 1st Edition - $0.30
Damaged 1st Edition - $0.20
NM-Mint Unlimited Non English - $0.25
Lightly Played Unlimited Non English - $0.23
Moderately Played Unlimited Non English - $0.20
Heavily Played Unlimited Non English - $0.17
Damaged Unlimited Non English - $0.13
NM-Mint 1st Edition Non English - $0.40
Lightly Played 1st Edition Non English - $0.30
Moderately Played 1st Edition Non English - $0.30
Heavily Played 1st Edition Non English - $0.30
Damaged 1st Edition Non English - $0.20