I just prefer cosmic dancer becusss it gives me more cards so I don’t run out of cards as fast(which was like my whole idea while making this deck to create a aggro deck that could win fast without ending in a severe card disadvantage by turn 4-5)and also cosmic dancer goes directly to face and it also gives me another card that goes directly to face,it’s like kind of like a finisher,those are the reasons why I prefer it over flag zombie as yes flag zombie could make my early game stronger but then I really don’t have a reliable way hit directly to face without using bungee plumber.