Ikra Shidiqi, the Usurper

Mana cost: {3}{B}{G}
Type: Legendary Creature — Snake Wizard
Power / toughness: 3 / 7
Set: Treasure Chest #58 (mythic)

Menace
Whenever a creature you control deals combat damage to a player, you gain life equal to that creature's toughness.
Partner (You can have two commanders if both have partner.)

Ikra Shidiqi, the Usurper has 7 printings, first in Commander 2016 (2016). EDHREC ranks it #3,681 among Commander cards. It appears most in Felothar the Steadfast decks (13,412 on EDHREC). 3 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: not legal

Public decks that run Ikra Shidiqi, the Usurper

Abzan Armor - Tarkir: Dragonstorm Commander, led by Felothar the Steadfast
Breed Lethality - Commander 2016, led by Atraxa, Praetors' Voice
Breed Lethality - Commander Anthology Volume II, led by Atraxa, Praetors' Voice

Commanders that run Ikra Shidiqi, the Usurper most

Deck counts from EDHREC.

Often played with Ikra Shidiqi, the Usurper

Cards that show up in the same decks on EDHREC.

Rulings

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: 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 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: The amount of life you gain is determined as Ikra Shidiqi's triggered ability resolves. If that creature is no longer on the battlefield, use its toughness as it last existed on the battlefield to determine how much life to gain.
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: An effect that checks whether you control your commander is satisfied if you control one or both of your two commanders.
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.