The Lost Caverns of Ixalan

Market Gnome | Artifact Creature | Gnome | When Market Gnome dies, you gain 1 life and draw a card. When Market Gnome is exiled from the battlefield while you're activating a craft ability, you gain 1 life and draw a card. | Gaboleps

Miner's Guidewing | Creature | Bird | Flying, vigilance When Miner's Guidewing dies, target creature you control explores. (Reveal the top card of your library. Put that card into your hand if it's a land. Otherwise, put a +1/+1 counter on that creature, then put the card back or put it into your graveyard.) | Allen Douglas

Ruin-Lurker Bat | Creature | Bat | Flying, lifelink At the beginning of your end step, if you descended this turn, scry 1. (You descended if a permanent card was put into your graveyard from anywhere.) | Camille Alquier

Warden of the Inner Sky | Creature | Human Soldier | As long as Warden of the Inner Sky has three or more counters on it, it has flying and vigilance. Tap three untapped artifacts and/or creatures you control: Put a +1/+1 counter on Warden of the Inner Sky. Scry 1. Activate only as a sorcery. | Raoul Vitale