Thestalos the Firestorm Monarch is a Common Effect Monster card from Yu-Gi-Oh! (Structure Deck: Blaze of Destruction, SD3). Current market price: $0.65.
Common
Structure Deck: Blaze of Destruction (SD3)
Card Text
If this card is Tribute Summoned: Discard 1 random card from your opponent's hand, then, if it was a Monster Card, inflict damage to your opponent equal to its original Level x 100.
