Sidar Jabari of Zhalfir is a mythic Legendary Creature — Human Knight card from March of the Machine Commander (MOC), collector number 97. Current market price: $2.53 (foil $5.21), TCGplayer market prices via Scryfall.
Eminence — Whenever you attack with one or more Knights, if Sidar Jabari is in the command zone or on the battlefield, draw a card, then discard a card. Flying, first strike Whenever Sidar Jabari deals combat damage to a player, return target Knight creature card from your graveyard to the battlefield.