Hero Signal is a Common Trap Card card from Yu-Gi-Oh! (Speed Duel GX: Duel Academy Box, SGX1). Current market price: $0.07.
Common
Speed Duel GX: Duel Academy Box (SGX1)
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.
