Your search for "Hero Signal RYMP-EN031" revealed the following:
Hero Signal - RYMP-EN031 - Super Rare - 1st Edition from Ra Yellow Mega Pack 1st Edition, available at 401 Games Canada. Rarity: Super Rare Card Text:When a monster you control is destroyed by battle and sent to the Graveyard:...
Hero Signal - RYMP-EN031 - Super Rare - Unlimited from Ra Yellow Mega Pack Unlimited, available at 401 Games Canada. Rarity: Super Rare Card Text:When a monster you control is destroyed by battle and sent to the Graveyard: Special Summon...