This card is a walking, undying thanks, I hate it meme.
Meanwhile it brings a powerful presence
It comes back of every Oath of Kaya, Mazemind Tome and Charming Prince to just keep drawing cards or continuously attack your opponent with 3/1s
In fact, the opposite is almost true, as none of the thirteen serialized Doctor cards are that amazing in Commander
If you somehow control two Elesh Norns, a permanent entering the battlefield causes abilities to trigger three times, not four
removing cards from the graveyard tends to correlate to grindy games that benefit from a creature you can chuck into play that slowly accrues advantage over a long game, especially if you throw in some cards that care about zombies or tokens