Stoneforge Mystic no longer finds Colossus Hammer (or anything else), Archon of Cruelty is just a big flier and no longer wins the game for Creativity decks, Primeval Titan cant tutor up lands and gets blocked by Elesh Norn, Mother of Machines for days, Omnaths landfall ability doesnt trigger - the list of popular decks and cards that Elesh Norn stops is surprisingly long
Having more mana at your disposal is better than being mana screwed
Where Emeritus of Woe really starts to pop off, however, is when you incorporate your own sacrifice synergies
Ob Nixilis Reignited + Ob Nixilis, the Hate-Twisted There was a period of Magic history when every other new planeswalker card was modeled after Ob Nixilis Reignited, to the point where 5-mana planeswalkers all kind of blended together
You can't choose the name of a token unless it's also the name of a card
The Dragon side tended to be a little overcosted for the body youre getting, but thanks to The Ur-Dragons discount, theyre even better