Commander creatures you own have "Whenever this creature becomes tapped, it and other creatures you control that share a creature type with it each get +2/+0 and gain undying until end of turn." (When a creature with undying dies, if it had no +1/+1 counters on it, return it to the battlefield under its owner's control with a +1/+1 counter on it.)

Whenever this creature or another creature dies, target player loses 1 life and you gain 1 life.

Whenever one or more other creatures die, draw a card. This ability triggers only once each turn.

At the beginning of your upkeep, you draw a card and you lose 1 life.

Scry 2, then draw two cards. You lose 2 life. (To scry 2, look at the top two cards of your library, then put any number of them on the bottom and the rest on top in any order.)

Target player draws two cards and loses 2 life.

This land enters tapped. When this land enters, exile target player's graveyard. {T}: Add {B}.

This land enters tapped. {T}: Add {C}. {2}, {T}, Sacrifice this land: Search your library for up to two basic land cards that share a land type, put them onto the battlefield tapped, then shuffle.

({T}: Add {B}.)

{T}: Add one mana of any color in your commander's color identity.

Add {B}{B}{B}.

Black spells you cast cost {1} less to cast.

{T}, Sacrifice another creature: Add {B}{B}{B}. Spend this mana only to cast Vampire, Cleric, and/or Demon spells.

{T}: Add {C}. {1}, {T}, Sacrifice this artifact: Draw a card.

{T}: Add one mana of any color. {1}, {T}: Untap target legendary creature you control.

When this creature enters, add {B}{B}{B}.

{T}: Add {C}{C}.

{3}{B}, Sacrifice this creature: Return target creature card from your graveyard to the battlefield. Activate only as a sorcery.

{B}, {T}, Sacrifice this creature: Return target creature card from your graveyard to the battlefield.

{3}{B}, Sacrifice this creature: Return target creature card from your graveyard to the battlefield. Activate only as a sorcery.

At the beginning of your upkeep, if there are four or more creature cards in your graveyard, return a creature card at random from your graveyard to your hand. Choose a Background (You can have a Background as a second commander.)

Target creature gets -1/-1 until end of turn. Morbid — That creature gets -13/-13 until end of turn instead if a creature died this turn.

Other Clerics you control get +1/+1. {3}{B}{B}, {T}, Sacrifice another Cleric: Search your library for a black creature card, put it onto the battlefield, then shuffle.

Commander creatures you own have "Creature tokens you control get +2/+2."