I played the daylights out of this card when it was in Standard, and I still play it in every format just because it is so awesome
Thankfully, however, there is a good reason this Lord of the Pit cost so much: its rarity
Its important to note that this is often a replacement effect, and so the owner of permanent(s) being affected chooses the order in which a replacement effect is applied
feels like a direct successor to Lava Golem
Magic has plenty of cards that synergize with tokens, whether were talking about creatures that get their power and toughness from your board state or that do something when your creatures or artifacts enter the battlefield
Youll require two undying creatures in play, sacrificing the first to put a -1/-1 counter on the other, effectively resetting the +1/+1 counter from the undying mechanic