Oliver Barrett

Charred Foyer // Warped Space

At the beginning of your upkeep, exile the top card of your library. You may play it this turn. // Once each turn, you may pay {0} rather than pay the mana cost for a spell you cast from exile.
(You may cast either half. That door unlocks on the battlefield. As a sorcery, you may pay the mana cost of a locked door to unlock it.)

At the beginning of your upkeep, exile the top card of your library. You may play it this turn.
(You may cast either half. That door unlocks on the battlefield. As a sorcery, you may pay the mana cost of a locked door to unlock it.)

Kobayashi Maru Scenario

At the beginning of your upkeep, choose one that hasn't been chosen —
• Hail — Return up to one target creature an opponent controls with mana value 3 or less to its owner's hand.
• Sensors — Draw two cards.
• Transport — Create two 1/1 red Officer creature tokens.
• Abandon Ship — You lose the game.

The Destruction of Praxis

Strange new worlds — All creatures get -X/-X until end of turn, where X is the number of differently named lands you control. If X is 6 or more, create two 2/1 red Klingon Warrior creature tokens with haste.

Stella Lee, Wild Card

Whenever you cast your second spell each turn, exile the top card of your library. Until the end of your next turn, you may play that card.
{T}: Copy target instant or sorcery spell you control. You may choose new targets for the copy. Activate only if you've cast three or more spells this turn.

Sarek, Federation Ambassador

Federation — At the beginning of combat on your turn, draw a card for every five creature types among non-Borg creatures you control. If you draw three or more cards this way, put two +1/+1 counters on each creature you control.

Mogis, God of Slaughter

Indestructible
As long as your devotion to black and red is less than seven, Mogis isn't a creature.
At the beginning of each opponent's upkeep, Mogis deals 2 damage to that player unless they sacrifice a creature of their choice.

"You've slithered right into the viper's nest."

Isshin, Two Heavens as One

If a creature attacking causes a triggered ability of a permanent you control to trigger, that ability triggers an additional time.

Genesis Device

When Genesis Device enters, search your library for a basic land card or Planet card, put it onto the battlefield tapped, then shuffle.
{3}{G}{G}, {T}, Sacrifice Genesis Device: Sacrifice any number of lands you control, then search your library for up to that many land cards, put them onto the battlefield tapped, then shuffle. Activate only as a sorcery.

General Chang, Cold Warrior

{1}, Sacrifice a creature: Put a +1/+1 counter on each Klingon you control.

"If you don't surrender immediately, we'll begin targeting your cities. Respond."

Empress Galina

{U}{U}, {T}: Gain control of target legendary permanent. (This effect lasts indefinitely.)

"I will not allow you to lecture me about the merits of emotion."

Bruvac the Grandiloquent

If an opponent would mill one or more cards, they mill twice that many cards instead. (To mill a card, a player puts the top card of their library into their graveyard.)

Cryptcaller Chariot

Menace
Whenever you discard one or more cards, create that many tapped 2/2 black Zombie creature tokens.
Crew 2