The Lost Caverns of Ixalan

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

Ojer Pakpatiq, Deepest Epoch // Temple of Cyclical Time | Legendary Creature // Land | God // | Flying Whenever you cast an instant spell from your hand, it gains rebound. (Exile it as it resolves. At the beginning of your next upkeep, you may cast it from exile without paying its mana cost.) When Ojer Pakpatiq dies, return it to the battlefield tapped and transformed under its owner's control with three time counters on it. // (Transforms from Ojer Pakpatiq, Deepest Epoch.) {T}: Add {U}. Remove a time counter from this land. {2}{U}, {T}: Transform this land. Activate only if it has no time counters on it and only as a sorcery. | Chris Rahn

The Ancient One | Legendary Creature | Spirit God | Descend 8 — The Ancient One can't attack or block unless there are eight or more permanent cards in your graveyard. {2}{U}{B}: Draw a card, then discard a card. When you discard a card this way, target player mills cards equal to its mana value. | Victor Adame Minguez

Saheeli, the Sun's Brilliance | Legendary Creature | Human Artificer | {U}{R}, {T}: Create a token that's a copy of another target creature or artifact you control, except it's an artifact in addition to its other types. It gains haste. Sacrifice it at the beginning of the next end step. | Cynthia Sheppard