Imotekh the Stormlord is more interesting as a four-mana 3/3 that creates two 2/2 artifact creatures when an artifact leaves your graveyard, and also grants an artifact creature you control +2/+2 and menace for a turn
There's no problem here with Eldrazi Unbound , as it's one of the better mana bases for a given Commander precon
Instead of an extra foil common or uncommon, the Ikoria Commander card slot offers each one of the new cards in a non-foil treatment
On our endstep, the final text on Captain Nghathrod allows us to chose one target creature or artifact that was put into an opponents graveyard this turn and put it into play under our control
Unless, of course, your opponent is willing to pay the full cost of the song
Fortunately, there are no shortages of sources when it comes to learning more about whats in a game