Marija Tiurina

Path to Exile

Exile target creature. Its controller may search their library for a basic land card, put that card onto the battlefield tapped, then shuffle.

Captain Benjamin Sisko

At the beginning of your end step, create a 1/1 red Officer creature token for each dilemma you've faced this turn.
{2}{W}{U}{B}{R}{G}, {T}: Exile the top five cards of your library. You may cast any number of spells with mana value less than or equal to the number of Officers you control from among those cards without paying their mana costs.

The Holodeck

Once during each of your turns, you may play a permanent card you own from outside the game or from your graveyard.

Quark, Humble Proprietor

You can't sacrifice Treasure tokens.
At the beginning of each upkeep, create a Treasure token. (It's an artifact with "{T}, Sacrifice this token: Add one mana of any color.")

Quark's Bar

This land enters tapped unless you control two or more other lands.
When this land enters untapped, choose one —
• This land deals 1 damage to each opponent.
• Surveil 1.
{T}: Add {R}.

Nog, Ambitious Cadet

Menace
{1}: If Nog is a Rogue, he becomes a Ferengi Scout with base power and toughness 3/4 and gains "Whenever Nog becomes tapped, surveil 2."
{3}: If Nog is a Scout, he becomes a Ferengi Officer and gains "You may play lands from your graveyard" and "You may play an additional land on each of your turns."

Jadzia Dax, Living Legacy

At the beginning of your first main phase, put a +1/+1 counter on Jadzia Dax, then add an amount of {G} equal to the number of counters on her.
Transfer Symbiont — {2}{G}, Discard this card: Put two +1/+1 counters on target creature.

Dominion Saboteur

You may have this creature enter as a copy of any artifact or creature on the battlefield, except it isn't legendary. If you do, it enters with additional counters on it equal to the same number and kinds of counters the copied permanent has on it.

Dominion Infiltration

Choose X target creatures your opponents control. For each of them, create a token that's a copy of that creature, except it has changeling. Those tokens gain haste. Exile those tokens at the beginning of the next end step. (They're every creature type.)

Constable Odo

When Constable Odo enters, choose one —
• Tap target creature an opponent controls. Put two stun counters on it. (If a permanent with a stun counter would become untapped, remove one from it instead.)
• Investigate twice. (To investigate, create a Clue token. It's an artifact with "{2}, Sacrifice this token: Draw a card.")

Slash, Reptile Rampager

Alliance — Whenever another creature you control enters, Slash deals 2 damage to each opponent.
Whenever Slash attacks, create a 2/2 red Mutant creature token.

Renet, Temporal Apprentice

Flash
When Renet enters, return each other nonland permanent that entered this turn to its owner's hand.

Mikey & Leo, Chaos & Order

Whenever you put a counter on a creature you control, draw a card. This ability triggers only once each turn.

Krang & Shredder

Whenever Krang & Shredder enter or attack, each opponent exiles cards from the top of their library until they exile a nonland card.
Disappear — At the beginning of your end step, if a permanent left the battlefield under your control this turn, you may cast a card exiled with Krang & Shredder without paying its mana cost.

Jennika, Bad Apple Big Sister

When Jennika enters, create a 2/2 red Mutant creature token.
Plainscycling {2} ({2}, Discard this card: Search your library for a Plains card, reveal it, put it into your hand, then shuffle.)

Don & Raph, Hard Science

Menace
Whenever Don & Raph attack, the next noncreature spell you cast this turn has affinity for artifacts. (It costs {1} less to cast for each artifact you control.)

Casey Jones, Jury-Rig Justiciar

Haste
When Casey Jones enters, look at the top four cards of your library. You may reveal an artifact card from among them and put it into your hand. Put the rest on the bottom of your library in a random order.

Bebop & Rocksteady

Whenever Bebop & Rocksteady attack or block, sacrifice a permanent unless you discard a card.

April, Reporter of the Weird

Whenever April deals combat damage to a player, draw that many cards, then discard a card.

Fblthp: Completely, Utterly, Totally Lost

When you planeswalk to this plane and at the beginning of your upkeep, create a Map token. (It's an artifact with "{1}, {T}, Sacrifice this token: Target creature you control explores. Activate only as a sorcery.")
Whenever chaos ensues, draw two cards, then discard two cards. Untap up to three lands.

Forest

Well of Lost Dreams

Whenever you gain life, you may pay {X}, where X is less than or equal to the amount of life you gained. If you do, draw X cards.

Shelldock Isle

Hideaway 4 (When this land enters, look at the top four cards of your library, exile one face down, then put the rest on the bottom in a random order.)
This land enters tapped.
{T}: Add {U}.
{U}, {T}: You may play the exiled card without paying its mana cost if a library has twenty or fewer cards in it.

Intruder Alarm

Creatures don't untap during their controllers' untap steps.
Whenever a creature enters, untap all creatures.

Frantic Search

Draw two cards, then discard two cards. Untap up to three lands.

Fblthp, the Lost

When Fblthp enters, draw a card. If it entered from your library or was cast from your library, draw two cards instead.
When Fblthp becomes the target of a spell, shuffle Fblthp into its owner's library.