Yes, the card was deemed so strong (and for good reason) they actually removed it from drafting pool. Same with Faceless Summoner for example, which is back as well, but at least not as common as Abyssal.
Incorrect. The card was never banned (as long it was in an Arena-legal set), but it did have its occurrence rate cut by 50% in February 2017, along with Flamestrike.
Incorrect. The card was never banned (as long it was in an Arena-legal set), but it did have its occurrence rate cut by 50% in February 2017, along with Flamestrike.