Hero Signal is a Ultimate Rare Trap Card card from Yu-Gi-Oh! (The Lost Millennium, TLM). Current market price: $0.07.
Ultimate Rare
The Lost Millennium (TLM)
Card Text
When a monster you control is destroyed by battle and sent to the Graveyard: Special Summon 1 Level 4 or lower "Elemental HERO" monster from your hand or Deck.
