The Lost Caverns of Ixalan

Greedy Freebooter | Creature | Human Pirate | When Greedy Freebooter dies, scry 1 and create a Treasure token. (To scry 1, look at the top card of your library. You may put that card on the bottom. A Treasure token is an artifact with "{T}, Sacrifice this artifact: Add one mana of any color.") | David Palumbo

Stalactite Stalker | Creature | Goblin Rogue | Menace At the beginning of your end step, if you descended this turn, put a +1/+1 counter on Stalactite Stalker. {2}{B}, Sacrifice Stalactite Stalker: Target creature gets -X/-X until end of turn, where X is Stalactite Stalker's power. | Olivier Bernard