, Pay 3 life: Flip a coin. If you win the flip, you gain 6 life.

When Gallifrey Council Chamber enters, surveil 1. (Look at the top card of your library. You may put that card into your graveyard.)
: Add .
: Add one mana of any color. Spend this mana only to cast a Time Lord or Alien spell or activate an ability of a Time Lord or Alien.

Cohort — , Tap an untapped Ally you control: Put a +1/+1 counter on each creature you control.

Attach target Aura attached to a creature or land to another permanent of that type.

, , Discard a card: Each other player loses 2 life. You gain life equal to the life lost this way.

Flying, first strike

Affinity for artifacts (This spell costs less to cast for each artifact you control.)
When Imskir enters, you draw X cards and you lose X life, where X is half the number of artifacts you control, rounded down.
, Sacrifice an artifact: Imskir deals damage equal to the sacrificed artifact's mana value to any target.

Domain — Territorial Maro's power and toughness are each equal to twice the number of basic land types among lands you control.

Look at the top three cards of your library. You may reveal a creature card from among them and put it into your hand. Put the rest into your graveyard.
Flashback (You may cast this card from your graveyard for its flashback cost. Then exile it.)

Choose one —
• Destroy target monocolored creature.
• Destroy target artifact or enchantment.
• Draw two cards, then discard a card.

Whenever you scry, put a verse counter on this enchantment.
, Exile this enchantment: Draw a card for each verse counter on this enchantment. If it had seven or more verse counters on it, take an extra turn after this one. Activate only as a sorcery.

Flying
Sacrifice this creature: Counter target instant or sorcery spell unless its controller pays .

Destroy target Forest, green enchantment, or green planeswalker. If that permanent was a Nissa planeswalker, draw a card.

Flying
When this creature enters, destroy target creature that was dealt damage this turn.

Whenever this creature attacks and isn't blocked, you may gain control of target land defending player controls for as long as you control this creature. If you do, this creature assigns no combat damage this turn.

Creatures your opponents control get -1/-0 until end of turn if was spent to cast this spell, and creatures you control get +1/+0 until end of turn if was spent to cast this spell. (Do both if was spent.)

Double strike

(: Add .)

Vigilance
When this creature enters, gain control of up to one target creature with lesser power for as long as you control this creature. Then the Ring tempts you.

Hidden agenda (Start the game with this conspiracy face down in the command zone and secretly choose a card name. You may turn this conspiracy face up any time and reveal that name.)
You may spend mana as though it were mana of any color to cast spells with the chosen name.