The Lost Caverns of Ixalan

Armored Kincaller | Creature | Dinosaur | When Armored Kincaller enters the battlefield, you may reveal a Dinosaur card from your hand. If you do or if you control another Dinosaur, you gain 3 life. | John Tedrick

Huatli's Final Strike | Instant | | Target creature you control gets +1/+0 until end of turn. It deals damage equal to its power to target creature an opponent controls. | Marta Nael

In the Presence of Ages | Instant | | Reveal the top four cards of your library. You may put a creature card and/or a land card from among them into your hand. Put the rest into your graveyard. | Steve Prescott

Kaslem's Stonetree | Artifact | | When Kaslem's Stonetree enters the battlefield, look at the top six cards of your library. You may put a land card from among them onto the battlefield tapped. Put the rest on the bottom in a random order. Craft with Cave {5}{G} ({5}{G}, Exile this artifact, Exile a Cave you control or a Cave card from your graveyard: Return this card transformed under its owner's control. Craft only as a sorcery.) | Victor Adame Minguez

Malamet Scythe | Artifact | Equipment | Flash When Malamet Scythe enters the battlefield, attach it to target creature you control. Equipped creature gets +2/+2. Equip {4} ({4}: Attach to target creature you control. Equip only as a sorcery.) | Hristo D. Chukov

River Herald Guide | Creature | Merfolk Scout | Vigilance When River Herald Guide enters the battlefield, it 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 this creature, then put the card back or put it into your graveyard.) | David Astruga