Hero Signal

Yu-Gi-Oh Card: Hero Signal
Available from these partners:
Hero Signal
Type:Normal Trap
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.
Printings: Dark Revelations Volume 3 (DR3-EN229)
Duelist Pack 1: Jaden Yuki (DP1-EN028)
HERO Strike Structure Deck (SDHS-EN035)
Legendary Collection 2: Mega-Pack (LCGX-EN107)
Ra Yellow Mega-Pack (RYMP-EN031)
The Lost Millennium (TLM-EN049)