The Brothers' War

Desynchronize | Instant | | Target nonland permanent's owner puts it on the top or bottom of their library. Scry 2. | Rovina Cai

Flow of Knowledge | Instant | | Draw a card for each Island you control, then discard two cards. | Tuan Duong Chu

Keeper of the Cadence | Creature | Human Wizard | {3}: Put target artifact, instant, or sorcery card from a graveyard on the bottom of its owner's library. | Alix Branwyn

Koilos Roc | Creature | Bird | Flash Flying When Koilos Roc enters the battlefield, create a tapped Powerstone token. (It's an artifact with "{T}: Add {C}. This mana can't be spent to cast a nonartifact spell.") | Antonio José Manzanedo

Teferi, Temporal Pilgrim | Legendary Planeswalker | Teferi | Whenever you draw a card, put a loyalty counter on Teferi, Temporal Pilgrim. 0: Draw a card. −2: Create a 2/2 blue Spirit creature token with vigilance and "Whenever you draw a card, put a +1/+1 counter on this creature." −12: Target opponent chooses a permanent they control and returns it to its owner's hand. Then they shuffle each nonland permanent they control into its owner's library. | Magali Villeneuve

Geology Enthusiast | Creature | Human Artificer | At the beginning of your end step, create a tapped Powerstone token. (It's an artifact with "{T}: Add {C}. This mana can't be spent to cast a nonartifact spell.") {6}: Draw a card and put a +1/+1 counter on Geology Enthusiast. | Fajareka Setiawan

Tawnos, the Toymaker | Legendary Creature | Human Artificer | Whenever you cast a Beast or Bird creature spell, you may copy it, except the copy is an artifact in addition to its other types. (The copy becomes a token.) | Livia Prima