Card Errata:Hero Signal

New Card Lore: Activate only when a monster on your side of the field is destroyed by battle and sent to the Graveyard. Special Summon 1 Level 4 or lower "Elemental Hero" monster from your hand or Deck.

Old Card Lore: You can only activate this card when a monster on your side of the field is destroyed as a result of battle and sent to the Graveyard. Special Summon 1 Level 4 or lower monster from your hand or Deck that includes "Elemental Hero" in its card name.