Minthara, Merciless Soul

Minthara has ward {X}, where X is the number of experience counters you have.
At the beginning of your end step, if a permanent you controlled left the battlefield this turn, you get an experience counter.
Creatures you control get +1/+0 for each experience counter you have.

Karlach, Tiefling Zealot

First strike, haste
When this card specializes from your graveyard, return it from your graveyard to the battlefield. It perpetually gains "This creature can't block."
When this card specializes from any zone, create a 2/2 white Knight creature token. Creatures you control get +1/+1 and gain haste until end of turn.

Minthara of the Absolute

Starting intensity 0
Creatures you control get +X/+0, where X is Minthara of the Absolute's intensity.
Whenever one or more permanents you control leave the battlefield, cards you own named Minthara of the Absolute intensify by 1. This ability triggers only once each turn.

Karlach, Tiefling Spellrager

First strike, haste
When this card specializes from your graveyard, return it from your graveyard to the battlefield. It perpetually gains "This creature can't block."
When this card specializes from any zone, seek an instant or sorcery card with mana value 3 or less. Until end of turn, you may cast that card without paying its mana cost.

Shadowheart, Cleric of Graves

Deathtouch, lifelink
At the beginning of your end step, Shadowheart, Cleric of Graves deals 1 damage to each player.

Astarion's Thirst

Exile target creature. Put X +1/+1 counters on a commander creature you control, where X is the power of the creature exiled this way.

Karlach, Tiefling Berserker

First strike, haste
When this card specializes from your graveyard, return it from your graveyard to the battlefield. It perpetually gains "This creature can't block."
When this card specializes from any zone, target creature an opponent controls can't block this turn.

Shadowheart, Dark Justiciar

{1}{B}, {T}, Sacrifice another creature: Draw X cards, where X is that creature's power.
Choose a Background (You can have a Background as a second commander.)

Karlach, Fury of Avernus

Whenever you attack, if it's the first combat phase of the turn, untap all attacking creatures. They gain first strike until end of turn. After this phase, there is an additional combat phase.
Choose a Background (You can have a Background as a second commander.)

Karlach, Tiefling Punisher

First strike, haste
When this card specializes from your graveyard, return it from your graveyard to the battlefield. It perpetually gains "This creature can't block."
When this card specializes from any zone, you may sacrifice a creature. If you do, you draw two cards and each opponent loses 2 life.

Shadowheart, Cleric of War

Deathtouch
At the beginning of your end step, Shadowheart, Cleric of War deals 1 damage to each player.
Whenever you lose life during your turn, Shadowheart deals that much damage to each opponent.

Shadowheart, Cleric of Order

Deathtouch
At the beginning of your end step, Shadowheart, Cleric of Order deals 1 damage to each player.
Whenever you lose life during your turn, create a 2/2 white Knight creature token.

Gale, Waterdeep Prodigy

Whenever you cast an instant or sorcery spell from your hand, you may cast up to one target card of the other type from your graveyard. If a spell cast from your graveyard this way would be put into your graveyard, exile it instead.
Choose a Background (You can have a Background as a second commander.)

Karlach, Tiefling Guardian

First strike, haste
When this card specializes from your graveyard, return it from your graveyard to the battlefield. It perpetually gains "This creature can't block."
When this card specializes from any zone, another target creature you control gets +4/+4 until end of turn.

Karlach, Raging Tiefling

First strike
Rage Beyond Death — Specialize {6}. You may also activate this ability if Karlach, Raging Tiefling is in your graveyard.

Astarion, the Decadent

Deathtouch, lifelink
At the beginning of your end step, choose one —
• Feed — Target opponent loses life equal to the amount of life they lost this turn.
• Friends — You gain life equal to the amount of life you gained this turn.

Shadowheart, Sharran Cleric

Deathtouch
Specialize {2}. Activate only if a player has 13 or less life.
At the beginning of your end step, Shadowheart, Sharran Cleric deals 1 damage to each player.

Shadowheart, Cleric of Twilight

Deathtouch
Shadowheart, Cleric of Twilight can't be blocked by creatures with power 2 or less.
At the beginning of your end step, Shadowheart deals 1 damage to each player.
Whenever you lose life during your turn, put a +1/+1 counter on Shadowheart.

Shadowheart, Cleric of Trickery

Deathtouch
At the beginning of your end step, Shadowheart, Cleric of Trickery deals 1 damage to each player.
Whenever you lose life during your turn, draw a card.