Forgotten Attic enters tapped. When Forgotten Attic enters, look at the top card of your library. You may put it into your graveyard. {T}: Add {U} or {B}.
Decayed Bedchamber enters tapped. When Decayed Bedchamber enters, look at the top card of your library. You may put it into your graveyard. {T}: Add {B} or {G}.
Clocktower Hideout enters tapped. When Clocktower Hideout enters, look at the top card of your library. You may put it into your graveyard. {T}: Add {B} or {R}.
Chartered Treasury enters tapped. When Chartered Treasury enters, look at the top card of your library. You may put it into your graveyard. {T}: Add {R} or {G}.
Aristocrat's Gallery enters tapped. When Aristocrat's Gallery enters, look at the top card of your library. You may put it into your graveyard. {T}: Add {G} or {U}.
When Unmarked Vials enters, create a Vial token. (It's an artifact with “{1}, Sacrifice this and another permanent: Draw a card. Activate only during your turn.”) {1}, {T}: Add one mana of any color.
Prowess Pay 2 life: Change a target of target spell or ability to Straw Intellectual.
“The regent's conspirators had once suggested I could think no more than an effigy—I suppose I can demonstrate how that is of no constraint.” —Animus; or, Life's Mystery
As Stained Reliquary enters, choose a card type. {T}: Target player exiles a card from their graveyard of the chosen type. {2}, Exile Stained Reliquary: Exile all graveyards. Create a tapped 1/1 white Spirit creature token with flying.
Equipped creature gets +3/+1 and has reach. Equip {4}
“I can travel to your allies in a blink of an eye. I can fight, pass messages, or run weapons as needed. Anything that could help.” —Cathette to Kanvar
Deploy 4 (As this enters, you may tap any number of other creatures you control with total power 4 or more.) When Mechanical Tactician enters deployed, tap up to two target creatures an opponent controls. Those creatures don't untap during their controller's next untap step.
Equipped creature gets +4/+3. Equip—{2}, Put a -1/-1 counter on a creature you control.
“Wormwood's raids are of no concern; I am accustomed to work under these conditions, and will lend you defensive prototypes if need be.” —Simul to Hyden
Whenever you untap a nonland permanent, put a winding counter on Barton's Pocketwatch. {T}: Look at the top card of your library. You may put it into your graveyard. Then if Barton's Pocketwatch has twelve or more winding counters on it, exile it and take an extra turn after this one.
Whenever you cast an instant or sorcery spell, put a loyalty counter on Xenocrata and tap up to one target permanent. [0]: Each opponent can't untap more than three permanents during their next untap step. [–3]: Xenocrata deals 6 damage divided as you choose among any number of target creatures and/or planeswalkers. [–9]: Cast any number of instant and/or sorcery cards you own in exile and from your graveyard without paying their mana costs.
Flash When Witch of the Veil enters, if it was cast, you may sacrifice a creature. If you do, return that card to the battlefield under its owner's control.