If Noosegraf Mob is no longer on the battlefield or no longer has +1/+1 counters on it as its triggered ability resolves, you cant remove a counter from it and wont get a Zombie token
On a meta-level, a variety of Magic sets include special cards from previous sets and blocks, often with new art and even new card frames to provide collector's items to show off
The long and short of it is that because the static ability of Ashes of the Fallen changes the creature type to Lhurgoyf before Disa's triggered ability goes off, the combo does indeed work, and it can provide a massive power boost to the Graveyard Overdrive deck
Something very notable about LotR for me is that the books are basically the single most influential work of their genre
You've got the card's name, mana cost, color, and type, and that's before we've even gotten onto the larger bits of the card, such as the illustrations and rules