Thestalos the Mega Monarch (PRIO-EN035) - Primal Origin 1st Edition

You can Tribute Summon this card by Tributing 1 Tribute Summoned monster. When this card is Tribute Summoned: Look at your opponent's hand and discard 1 card from their hand, then, if it was a Monster Card, inflict damage to your opponent equal to its original Level x 200. If this card was Tributed Summoned by Tributing a FIRE monster, add this additional effect.
Also, inflict 1000 damage to your opponent after that.