Alharu, Solemn Ritualist

Mana cost: {4}{W}
Type: Legendary Creature — Human Monk
Power / toughness: 3 / 3
Set: Commander Legends #548 (uncommon)

When Alharu enters, put a +1/+1 counter on each of up to two other target creatures.
Whenever a nontoken creature you control with a +1/+1 counter on it dies, create a 1/1 white Spirit creature token with flying.
Partner (You can have two commanders if both have partner.)

Alharu, Solemn Ritualist has 6 printings, first in Commander Legends (2020). EDHREC ranks it #15,221 among Commander cards. It appears most in Bright-Palm, Soul Awakener decks (356 on EDHREC). 1 public deck on TCG runs it. It has 10 official rulings.

Legality

commander: legal
legacy: legal
vintage: legal
pauper: not legal
modern: not legal
pioneer: not legal
standard: not legal
brawl: not legal

Public decks that run Alharu, Solemn Ritualist

Call for Backup - March of the Machine Commander, led by Bright-Palm, Soul Awakener

Commanders that run Alharu, Solemn Ritualist most

Deck counts from EDHREC.

Bright-Palm, Soul Awakener: 356 decks
Anafenza, Kin-Tree Spirit: 61 decks
Colonel Autumn: 53 decks
Aron, Benalia's Ruin: 42 decks
Shaile, Dean of Radiance // Embrose, Dean of Shadow: 34 decks
Urdnan, Dromoka Warrior: 12 decks
Doctor Spectrum: 1 decks
Everett K. Ross, Hapless Attaché: 1 decks

Often played with Alharu, Solemn Ritualist

Cards that show up in the same decks on EDHREC.

Rulings

2020-11-10: If a creature you control with a +1/+1 counter on it dies at the same time as Alharu, Alharu's ability triggers for that creature.
2020-11-10: An effect that checks whether you control your commander is satisfied if you control one or both of your two commanders.
2020-11-10: To have two commanders, both must have the partner ability as the game begins. Losing the ability during the game doesn't cause either to cease to be your commander.
2020-11-10: You can choose two commanders with partner that are the same color or colors. In Commander Draft, you can even choose two of the same commander with partner if you drafted them. If you do this, make sure you keep the number of times you've cast each from the command zone clear for "commander tax" purposes.
2020-11-10: If your Commander deck has two commanders, you can only include cards whose own color identities are also found in your commanders' combined color identities. If Falthis and Kediss are your commanders, your deck may contain cards with black and/or red in their color identity, but not cards with green, white, or blue.
2020-11-10: You create just one Spirit token, not one for each +1/+1 counter that was on the creature that died.
2020-11-10: Once the game begins, your two commanders are tracked separately. If you cast one, you won't have to pay an additional {2} the first time you cast the other. A player loses the game after having been dealt 21 damage from any one of them, not from both of them combined.
2020-11-10: Both commanders start in the command zone, and the remaining 98 cards (or 58 cards in a Commander Draft game) of your deck are shuffled to become your library.
2020-11-10: If something refers to your commander while you have two commanders, it refers to one of them of your choice. If you are instructed to perform an action on your commander (e.g. put it from the command zone into your hand due to Command Beacon), you choose one of your commanders at the time the effect happens.
2020-11-10: If Alharu has a +1/+1 counter on it and dies, its ability triggers for itself.