One of them still occasionally sees competitive use today, as El Shaddoll Winda's ability to prevent the opponent from special summoning more than once in a turn is still incredibly useful in the modern era
A double activation with Yarok (who Ill discuss later) was awesome, and Ive dug myself out of many a losing situation with multiple bounces and trading the Dream Eaters 4 power for something scary
10 Eloise, Nephalia Sleuth This spicy commander lets you chain sacrifice triggers to investigate and surveil to your hearts content
Zygarde-EX has the (potentially devastating) Power Memory Item card, and while its not as good as Genesect-EXs G Booster, its still able to OHKO most Pokemon
Needless to say, preventing your opponent from special summoning from the extra deck for the price of 1 card makes me wonder if it should be banned
Assuming it copied something with a mana cost, the token will still have that mana cost, so it can be cast as normal from wherever it is if you have permission to do so