Ishai, Ojutai Dragonspeaker

Mana cost: {2}{W}{U}
Type: Legendary Creature — Bird Monk
Power / toughness: 1 / 1
Set: Commander Anthology Volume II #12 (mythic)

Flying
Whenever an opponent casts a spell, put a +1/+1 counter on Ishai.
Partner (You can have two commanders if both have partner.)

Ishai, Ojutai Dragonspeaker has 7 printings, first in Commander 2016 (2016). EDHREC ranks it #4,746 among Commander cards. It appears most in Choco, Seeker of Paradise decks (7,537 on EDHREC). 2 public decks on TCG run it. It has 8 official rulings.

Legality

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

Public decks that run Ishai, Ojutai Dragonspeaker

Breed Lethality - Commander 2016, led by Atraxa, Praetors' Voice
Breed Lethality - Commander Anthology Volume II, led by Atraxa, Praetors' Voice

Commanders that run Ishai, Ojutai Dragonspeaker most

Deck counts from EDHREC.

Often played with Ishai, Ojutai Dragonspeaker

Cards that show up in the same decks on EDHREC.

Rulings

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: 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: An ability that triggers when a player casts a spell resolves before the spell that caused it to trigger. It resolves even if that spell is countered.
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 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: 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: 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.