2 Level 8 monsters Once per turn: You can detach 1 Xyz Material from this card; place 1 String Counter on each face-up monster on the field, except this card. If you do, during your opponent's next End Phase: Destroy the monsters with String Counters, and if you do, inflict 500 damage to your opponent for each monster destroyed.
^Didn't you read the "instead of using this card" part? Forgive me i forgot that most player didn't read card effect either.
And using this card made it harder to summon desperado instead of the usual way, and like other said, they can still able to do whatever they want with their monster even after you use this card effect.
Didn’t you read that this is a Gimmick Puppet card, not Desperado? Forgive me that I didn’t know I’d have to explain who is the master and who is the tech card. They, Desperado, are one tech card to help Gimmick Puppets, not the other way around. This card is part of the archetype and is easily revived with Junk Puppet and Perform Puppet w/o an effect. Anyway it still forces opp to change plan.