Panharmonicon isn't a super widely played card despite the popularity of ETB cards, so I don't expect to see Elesh Norn outside of dedicated ETB decks or in tables that aren't expecting powerful cards like this one
The set also features Lugia V and VSTAR, which are featured in prominent decks used in competitive play
If the opponent tries to Special Summon from their Extra Deck while Lost Wind is in the GY, they can also set Lost Wind for free
Home printers cant typically print cards that look and feel like Magic cards, but theres a plethora of sites that let you insert a deck list and format a PDF file thats easy to print on regular printer paper
Given the massive card library, players figured out ways to make three DARK monsters a consistent condition, leading to Dark Armed Dragon being the lead boss monster of the deck Tele-DAD. Once the card was easily summoned, it meant that a monster with 2800 ATK capable of obliterating three cards on an opponents field could pop up at any moment