Emerge {5}{W} (You may cast this spell by sacrificing a creature and paying the emerge cost reduced by that creature's mana value.)

When Adipose Offspring enters the battlefield, create a 2/2 white Alien creature token. If Adipose Offspring's emerge cost was paid, instead create X of those tokens, where X is the sacrificed creature's toughness.

Whenever Astrid Peth enters the battlefield or attacks, create a Food token.

Brand-new Sky -- Whenever you sacrifice a Clue or Food, Astrid Peth explores. (Reveal the top card of your library. Put that card into your hand if it's a land. Otherwise, put a +1/+1 counter on this creature, then put the card back or put it into your graveyard.)

Flying

When Atraxi Warden enters the battlefield, exile up to one target tapped creature.

Suspend 5--{1}{W} (Rather than cast this card from your hand, you may pay {1}{W} and exile it with five time counters on it. At the beginning of your upkeep, remove a time counter. When the last is removed, cast it without paying its mana cost. It has haste.)

Target creature can't block this turn and becomes a Coward in addition to its other types until end of turn.

Time travel.

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Killer deals 3 damage to target creature and each other creature that shares a creature type with it.

Soulbond (You may pair this creature with another unpaired creature when either enters the battlefield. They remain paired for as long as you control both of them.)

Whenever Donna or a creature it's paired with is dealt damage, Donna deals that much damage to target opponent.

Doctor's companion (You can have two commanders if the other is the Doctor.)

Convoke (Your creatures can help cast this spell. Each creature you tap while casting this spell pays for {1} or one mana of that creature's color.)

Exile all creatures except those that share a creature type with a creature that convoked this spell, all artifacts, and all enchantments.

You may have Flesh Duplicate enter the battlefield as a copy of any creature on the battlefield, except it has vanishing 3 if that creature doesn't have vanishing. (A permanent with vanishing 3 enters the battlefield with three time counters on it. At the beginning of your upkeep, remove a time counter from it. When the last is removed, sacrifice it.)

Exile target nonland permanent. Each player other than its controller creates a token that's a copy of it.

When Grasp of Fate enters the battlefield, for each opponent, exile up to one target nonland permanent that player controls until Grasp of Fate leaves the battlefield. (Those permanents return under their owners' control.)

Vanishing 3

Imprint -- When Idris, Soul of the TARDIS enters the battlefield, exile another artifact you control until Idris leaves the battlefield.

Idris has all activated and triggered abilities of the exiled card and gets +X/+X, where X is the exiled card's mana value.

Double strike

Whenever Jenny deals combat damage to a player, it explores. (Reveal the top card of your library. Put that card into your hand if it's a land. Otherwise, put a +1/+1 counter on this creature, then put the card back or put it into your graveyard.)

Whenever you put one or more time counters on a permanent you control, create a 1/1 white Soldier creature token.

Whenever Kate Stewart attacks, you may pay {8}. If you do, attacking creatures get +X/+X until end of turn, where X is the number of time counters among permanents you control.

Woman Who Walked the Earth -- When Martha Jones enters the battlefield, investigate. (Create a Clue token. It's an artifact with "{2}, Sacrifice this artifact: Draw a card.")

Whenever you sacrifice a Clue, Martha Jones and up to one other target creature can't be blocked this turn.

Doctor's companion (You can have two commanders if the other is the Doctor.)

Choose target creature you control. Each other creature becomes a copy of that creature until end of turn, except it isn't legendary.

As Psychic Paper becomes attached to a creature, choose a creature card name and a creature type.

Equipped creature has ward {1}, it can't be blocked, and its name and creature type are the last chosen name and creature type.

Equip {2}

Flying, trample

When RMS Titanic deals combat damage to a player, sacrifice it and create that many Treasure tokens.

Crew 3 (Tap any number of creatures you control with total power 3 or more: This Vehicle becomes an artifact creature until end of turn.)

Vanishing 12 (This enchantment enters the battlefield with twelve time counters on it. At the beginning of your upkeep, remove a time counter from it. When the last is removed, sacrifice it.)

Whenever one or more time counters are removed from Regenerations Restored, scry 1 and you gain 1 life. Then if Regenerations Restored has no time counters on it, exile it. When you do, take an extra turn after this one.

One or two target creatures each gain haste until end of turn. They can't be blocked this turn except by creatures with haste.

Escape--{2}{U}{R}, Exile four other cards from your graveyard. (You may cast this card from your graveyard for its escape cost.)

You may cast creature spells as though they had flash.

Whenever one or more other creatures you control leave the battlefield, investigate. This ability triggers only once each turn. (Create a Clue token. It's an artifact with "{2}, Sacrifice this artifact: Draw a card.")

{T}: Add {C}{C}. Activate only if you control five or more lands.

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after IV.)

I, II, III -- Exile cards from the top of your library until you exile a legendary card. You may play that card for as long a The Day of the Doctor remains on the battlefield. Put the rest of those exiled cards on the bottom of your library in a random order.

IV -- Choose up to three Doctors. You may exile all other creatures. If you do, The Day of the Doctor deals 13 damage to you.

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)

I -- Create a 1/1 white Human Noble creature token with vanishing 3 and "Prevent all damage that would be dealt to this creature."

II -- Create a 2/2 white Horse creature token with "Doctors you control have horsemanship." (They can't be blocked except by creatures with horsemanship.)

III -- Whenever a creature you control deals combat damage to a player this turn, time travel.

At the beginning of your upkeep, put a time counter on The Moment.

{2}, {T}: Untap target creature you control. It phases out until The Moment leaves the battlefield.

{3}, {T}: Destroy each nonland permanent with mana value less than or equal to the number of time counters on The Moment. Then sacrifice The Moment. Activate only as a sorcery.

When Wedding Ring enters the battlefield, if it was cast, target opponent creates a token that's a copy of it.

Whenever an opponent who controls an artifact named Wedding Ring draws a card during their turn, you draw a card.

Whenever an opponent who controls an artifact named Wedding Ring gains life during their turn, you gain that much life.

Look to the Stars -- At the beginning of your upkeep, put a time counter on Wilfred Mott. Then look at the top X cards of your library, where X is the number of time counters on Wilfred Mott. You may put a nonland permanent card with mana value 3 or less from among them onto the battlefield. Put the rest on the bottom of your library in a random order.