The Fabled Peggulsus (HA04-EN041)

When this card is discarded to the Graveyard, you can Special Summon it face-down on your side of the field. When this card is flipped face-up, you can reveal 1 "Fabled" monster in your hand to send 1 "Fabled" monster from your Deck to the Graveyard.

Beast / Tuner, Hidden Arsenal 4: Trishula's Triumph