The Lost Caverns of Ixalan

Cogwork Wrestler | Artifact Creature | Gnome | Flash When Cogwork Wrestler enters the battlefield, target creature an opponent controls gets -2/-0 until end of turn. | Tomek Larek

The Enigma Jewel // Locus of Enlightenment | Legendary Artifact // Legendary Artifact | | The Enigma Jewel enters tapped. {T}: Add {C}{C}. Spend this mana only to activate abilities. Craft with four or more nonlands with activated abilities {8}{U} ({8}{U}, Exile this artifact, Exile the four or more from among other permanents you control and/or cards in your graveyard: Return this card transformed under its owner's control. Craft only as a sorcery.) // Locus of Enlightenment has each activated ability of the exiled cards used to craft it. You may activate each of those abilities only once each turn. Whenever you activate an ability that isn't a mana ability, copy it. You may choose new targets for the copy. | Martin de Diego Sádaba

Orazca Puzzle-Door | Artifact | | {1}, {T}, Sacrifice Orazca Puzzle-Door: Look at the top two cards of your library. Put one of those cards into your hand and the other into your graveyard. | Cristi Balanescu

Relic's Roar | Instant | | Until end of turn, target artifact or creature becomes a Dinosaur artifact creature with base power and toughness 4/3 in addition to its other types. | Nino Vecia

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

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