The Lost Caverns of Ixalan

Explorer's Cache | Artifact | | Explorer's Cache enters the battlefield with two +1/+1 counters on it. Whenever a creature you control with a +1/+1 counter on it dies, put a +1/+1 counter on Explorer's Cache. {T}: Move a +1/+1 counter from Explorer's Cache onto target creature. Activate only as a sorcery. | Marzena Nereida Piwowar

Glimpse the Core | Sorcery | | Choose one — • Search your library for a basic Forest card, put that card onto the battlefield tapped, then shuffle. • Return target Cave card from your graveyard to the battlefield tapped. | Francisco Miyara

Tendril of the Mycotyrant | Creature | Fungus Wizard | {5}{G}{G}: Put seven +1/+1 counters on target noncreature land you control. It becomes a 0/0 Fungus creature with haste. It's still a land. | Maxime Minard

Nicanzil, Current Conductor | Legendary Creature | Merfolk Scout | Whenever a creature you control explores a land card, you may put a land card from your hand onto the battlefield tapped. Whenever a creature you control explores a nonland card, put a +1/+1 counter on Nicanzil, Current Conductor. | Fariba Khamseh

Itzquinth, Firstborn of Gishath | Legendary Creature | Dinosaur | Haste When Itzquinth, Firstborn of Gishath enters the battlefield, you may pay {2}. When you do, target Dinosaur you control deals damage equal to its power to another target creature. | Lars Grant-West