Flying
Whenever a creature dealt damage by this creature this turn dies, put a +1/+1 counter on this creature.

Flying
Whenever another creature dies, put two +1/+1 counters on Sengir.
Whenever another player loses the game, you gain life equal to that player's life total as the turn began.
Partner

Flying
, Exile this creature: Create a 1/2 black Bat creature token with flying. It has ", Sacrifice this token: Return an exiled card named Sengir Nosferatu to the battlefield under its owner's control."

Flying
Whenever one or more other creatures die, put a +1/+1 counter on this creature. This ability triggers only once each turn.

Flying
Whenever a creature dealt damage by this creature this turn dies, put a +1/+1 counter on this creature.

When this creature enters, create three 0/1 black Serf creature tokens.
When this creature leaves the battlefield, exile all Serf tokens.

Tap up to two target creatures.
Spell mastery — If there are two or more instant and/or sorcery cards in your graveyard, those creatures don't untap during their controllers' next untap steps.

Each opponent discards a card. You create a 1/1 black and green Pest creature token with "Whenever this token attacks, you gain 1 life."

Artifacts you control are Clues in addition to their other types and have ", Sacrifice this artifact: Draw a card."
Whenever you sacrifice a Clue, target creature can't be blocked this turn.

, : You gain 2 life.
, : Draw a card, then discard a card.

Flying
When this creature enters, scry 1.

Flying
: This creature gains vigilance until end of turn.

At the beginning of your upkeep, choose target opponent. This turn, that player can't cast spells or activate abilities and plays with their hand revealed. You may play lands and cast spells from that player's hand this turn.

Exile any number of target creatures and/or planeswalkers you control. At the beginning of the next end step, return each of them to the battlefield under its owner's control. Each of them enters with an additional +1/+1 counter on it if it's a creature and an additional loyalty counter on it if it's a planeswalker.

This creature enters prepared.
When this creature enters, surveil 1.

Whenever Semblance Scanner or equipped creature deals combat damage to a player, if it's not a token, conjure a duplicate of it into your hand.
Reconfigure

Imprint — When this artifact enters, you may exile a nonland card from your hand.
Spells you cast that share a card type with the exiled card cost less to cast.

Council's dilemma — Starting with you, each player votes for wild or free. Reveal cards from the top of your library until you reveal a creature card for each wild vote. Put those creature cards onto the battlefield, then shuffle the rest into your library. You may put a permanent card from your hand onto the battlefield for each free vote.

Parley — When this creature enters, each player reveals the top card of their library. For each nonland card revealed this way, put a +1/+1 counter on this creature. Then each player draws a card.

Parley — Each player reveals the top card of their library. For each nonland card revealed this way, you create a 3/3 green Elephant creature token. Then each player draws a card.

Whenever another creature enters, its controller may draw a card if its power is greater than each other creature's power.
, : Add X mana in any combination of colors, where X is the greatest power among creatures you control.

Parley — : Each player reveals the top card of their library. For each nonland card revealed this way, add and you gain 1 life. Then each player draws a card.

Vigilance
Whenever you cast a creature spell, create a 1/1 red Mercenary creature token with ": Target creature you control gets +1/+0 until end of turn. Activate only as a sorcery."
: Choose a color. Add one mana of that color for each different power among creatures you control.

Rulebreaker — A deck with this commander can have Angel cards of any color identity and any basic land cards.
Flying
Whenever Seluma deals combat damage to a player, return target Angel creature card from your graveyard to the battlefield.

When this creature dies, it deals 2 damage to you.

When this creature enters, create a 1/1 white Bird creature token with flying.

When this creature enters, if you control two or more Forests, you may gain 3 life.
When this creature enters, if you control two or more Islands, you may return target tapped creature to its owner's hand.

Whenever this creature or another creature dies, target player mills a card.

, Discard a creature card: Draw a card.

Create a token that's a copy of target creature you control.
Flashback