Deathtouch
Whenever another creature you control enters, you gain 1 life.
Whenever another creature you control dies, each opponent loses 1 life.

(: Add .)

, , Sacrifice this creature: Search your library for up to two basic land cards, reveal them, put one onto the battlefield tapped and the other into your hand, then shuffle.

, Sacrifice a creature: Destroy target nonblack creature.

Soulbond (You may pair this creature with another unpaired creature when either enters. They remain paired for as long as you control both of them.)
Whenever Donna Noble or a creature it's paired with is dealt damage, Donna Noble deals that much damage to target opponent.
Doctor's companion (You can have two commanders if the other is the Doctor.)

Search your library for a Plains, Island, Swamp, or Mountain card, put it onto the battlefield tapped, then shuffle.

Deathtouch
The first instant or sorcery spell you cast each turn has casualty 2. (As you cast that spell, you may sacrifice a creature with power 2 or greater. When you do, copy the spell and you may choose new targets for the copy.)

This land enters tapped unless you control a Swamp or a Mountain.
: Add or .

When this creature dies, each player discards their hand.

Look at the top two cards of your library. Put one of them into your hand and the other on the bottom of your library.

Haste
At the beginning of your upkeep, if this card is in your graveyard with three or more creature cards above it, you may put this card onto the battlefield.

Flying
When this creature enters, investigate X times, where X is the number of opponents you have. (To investigate, create a Clue token. It's an artifact with ", Sacrifice this token: Draw a card.")
Whenever you draw your second card each turn, create a 1/1 white Spirit creature token with flying.

When this land enters, sacrifice it unless you return a non-Lair land you control to its owner's hand.
: Add , , or .

Sacrifice a nontoken permanent. If you do, target opponent loses 2 life unless that player sacrifices a permanent of their choice or discards a card. You may repeat this process any number of times.

When this creature enters, you may destroy target artifact.
Artifacts your opponents control enter tapped.

(As this Saga enters and after your draw step, add a lore counter. Sacrifice after III.)
I — Destroy all lands.
II, III — Each player returns two land cards from their graveyard to the battlefield.

Spend only black mana on X.
Consume Spirit deals X damage to any target and you gain X life.

All Sliver creatures have "This creature gets +1/+1 as long as you control a Swamp."
All Slivers have ": Regenerate this permanent." (The next time it would be destroyed this turn, instead tap it, remove it from combat, and heal all damage on it.)

Prowess
This creature enters prepared. (While it's prepared, you may cast a copy of its spell. Doing so unprepares it.)

Return all creature cards with mana value 2 or less from your graveyard to the battlefield.