Thestalos the Firestorm Monarch is a Rare Effect Monster card from Yu-Gi-Oh! (Duelist League 3 participation cards, DL12). Current market price: $0.65.
Rare
Duelist League 3 participation cards (DL12)
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.
