Hero Signal is a Common Trap Card card from Yu-Gi-Oh! (Legendary Duelists: Season 3, LDS3). Current market price: $0.07.
Common
Legendary Duelists: Season 3 (LDS3)
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.
