The Lost Caverns of Ixalan

Chart a Course | Sorcery | | Draw two cards. Then discard a card unless you attacked this turn. | Josu Solano

Confounding Riddle | Instant | | Choose one — • Look at the top four cards of your library. Put one of them into your hand and the rest into your graveyard. • Counter target spell unless its controller pays {4}. | A. M. Sartor

Council of Echoes | Creature | Spirit Advisor | Flying Descend 4 — When Council of Echoes enters the battlefield, if there are four or more permanent cards in your graveyard, return up to one target nonland permanent other than Council of Echoes to its owner's hand. | Fariba Khamseh

Eaten by Piranhas | Enchantment | Aura | Flash Enchant creature Enchanted creature loses all abilities and is a black Skeleton creature with base power and toughness 1/1. (It loses all other card types and creature types.) | Abz J Harding

Hermitic Nautilus | Artifact Creature | Nautilus | Vigilance {1}{U}: Hermitic Nautilus gets +3/-3 until end of turn. | Logan Feliciano

Hurl into History | Instant | | Counter target artifact or creature spell. Discover X, where X is that spell's mana value. (Exile cards from the top of your library until you exile a nonland card with that mana value or less. Cast it without paying its mana cost or put it into your hand. Put the rest on the bottom in a random order.) | Eli Minaya

Lodestone Needle | Artifact | | Flash When Lodestone Needle enters the battlefield, tap up to one target artifact or creature and put two stun counters on it. Craft with artifact {2}{U} ({2}{U}, Exile this artifact, Exile another artifact you control or an artifact card from your graveyard: Return this card transformed under its owner's control. Craft only as a sorcery.) | José Parodi

Merfolk Cave-Diver | Creature | Merfolk Scout | Whenever a creature you control explores, Merfolk Cave-Diver gets +1/+0 until end of turn and can't be blocked this turn. | Fesbra

Self-Reflection | Sorcery | | Create a token that's a copy of target creature you control. Flashback {3}{U} (You may cast this card from your graveyard for its flashback cost. Then exile it.) | Henry Peters

Sinuous Benthisaur | Creature | Dinosaur | When Sinuous Benthisaur enters the battlefield, look at the top X cards of your library, where X is the number of Caves you control plus the number of Cave cards in your graveyard. Put two of those cards into your hand and the rest on the bottom of your library in a random order. | John Tedrick

Spyglass Siren | Creature | Siren Pirate | Flying When Spyglass Siren enters the battlefield, create a Map token. (It's an artifact with "{1}, {T}, Sacrifice this artifact: Target creature you control explores. Activate only as a sorcery.") | David Astruga

Staunch Crewmate | Creature | Human Pirate | When Staunch Crewmate enters the battlefield, look at the top four cards of your library. You may reveal an artifact or Pirate card from among them and put it into your hand. Put the rest on the bottom of your library in a random order. | LA Draws

Waterlogged Hulk | Artifact | | {T}: Mill a card. (Put the top card of your library into your graveyard.) Craft with Island {3}{U} ({3}{U}, Exile this artifact, Exile an Island you control or an Island card from your graveyard: Return this card transformed under its owner's control. Craft only as a sorcery.) | Artur Treffner

Zoetic Glyph | Enchantment | Aura | Enchant artifact Enchanted artifact is a Golem creature with base power and toughness 5/4 in addition to its other types. When Zoetic Glyph is put into a graveyard from the battlefield, discover 3. | Yeong-Hao Han

Master's Guide-Mural | Artifact | | When Master's Guide-Mural enters the battlefield, create a 4/4 white and blue Golem artifact creature token. Craft with artifact {4}{W}{W}{U} ({4}{W}{W}{U}, Exile this artifact, Exile another artifact you control or an artifact card from your graveyard: Return this card transformed under its owner's control. Craft only as a sorcery.) | Racrufi

Uchbenbak, the Great Mistake | Legendary Creature | Skeleton Horror | Vigilance, menace Descend 8 — {4}{U}{B}: Return Uchbenbak, the Great Mistake from your graveyard to the battlefield with a finality counter on it. Activate only if there are eight or more permanent cards in your graveyard and only as a sorcery. (If a creature with a finality counter on it would die, exile it instead.) | Steven Belledin

Captain Storm, Cosmium Raider | Legendary Creature | Human Pirate | Whenever an artifact enters the battlefield under your control, put a +1/+1 counter on target Pirate you control. | Diego Gisbert

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