{T}: Add {U} or {B}.

{U/B}{U/B}{U/B}{U/B}, {T}, Sacrifice Dimir Locket: Draw two cards.

When Fourth Bridge Prowler enters the battlefield, you may have target creature get -1/-1 until end of turn.

Enchant artifact or creature

Enchanted permanent doesn't untap during its controller's untap step.

Prowess (Whenever you cast a noncreature spell, this creature gets +1/+1 until end of turn.)

Whenever Jhessian Thief deals combat damage to a player, draw a card.

---

Target player mills four cards. (Then exile this card. You may cast the creature later from exile.)

When Minister of Inquiries enters the battlefield, you get {E}{E} (two energy counters).

{T}, Pay {E}: Target player mills three cards.

Defender (This creature can't attack.)

When Overwhelmed Apprentice enters the battlefield, each opponent mills two cards. Then you scry 2. (Look at the top two cards of your library, then put any number of them on the bottom of your library and the rest on top in any order.)

You may choose new targets for target spell.

Landfall -- Whenever a land enters the battlefield under your control, each opponent mills three cards. (To mill a card, a player puts the top card of their library into their graveyard.)

Whenever Scroll Thief deals combat damage to a player, draw a card.

Whenever you draw a card, target opponent mills two cards. If two nonland cards that share a color were milled this way, repeat this process.

{5}{U}: Draw a card, then discard a card.

Target opponent reveals the top seven cards of their library. You may cast an instant or sorcery spell from among them without paying its mana cost. Then that player puts the rest into their graveyard.

Spell mastery -- If there are two or more instant and/or sorcery cards in your graveyard, you may cast up to two instant and/or sorcery spells from among the revealed cards instead of one.

Flying

Whenever Thief of Sanity deals combat damage to a player, look at the top three cards of that player's library, exile one of them face down, then put the rest into their graveyard. You may cast that card for as long as it remains exiled, and mana of any type can be spent to cast it.

Flying

Vantress Gargoyle can't attack unless defending player has seven or more cards in their graveyard.

Vantress Gargoyle can't block unless you have four or more cards in hand.

{T}: Each player mills a card.