Yzma, Scary Beyond All Reasons Cruel Irony ability means that when shes played, you choose a character on the table to shuffle into their players deck, before that player draws two cards
Effectively, you're running 5-7 copies of the card via Analyze the Pollen tutoring, and its auto recursion makes it somewhat harder to permanently remove
This event interestingly enough had 64 players in it, which is actually more players than the Saturday afternoon event
Reddit and Discord discussion in Pokemon TCG communities consistently mentions N's Zoroark ex as one of the must-haves from Journey Together
Itll hit an artifact or enchantment more often than not, but cashing it in for a one-time proliferation is a great alternative option
You can't choose to leave some in the graveyard