Krenko, Baron of Tin Street is a rare Legendary Creature — Goblin card from Murders at Karlov Manor Promos (PMKM), collector number 135s. Current market price: — (foil $1.26), TCGplayer market prices via Scryfall.
Haste {T}, Sacrifice an artifact: Put a +1/+1 counter on each Goblin you control. Whenever an artifact is put into a graveyard from the battlefield, you may pay {R}. If you do, create a 1/1 red Goblin creature token. It gains haste until end of turn.