The Xyz Monster itself will tell you how many monsters you need to use in the same place that a Synchro Monster tells you what monsters you need to use
This helps to play around with effects that can negate a summon, as you never used the effect and can try again with a different copy of Dormouse
I was playing around with Bad Translator and decided to make some replicas
Rush Challenge : A set of mini-stories with specific requirements to progress, beating them unlocks new Deck recipes
Synchro luster and a level 4 into Ignister, Ignister ef summon another Luster from deck, then you can use Ignister ef to pop a scale and spin a card without targeting, XYZ Luster and a level 4 into Majester, Majester effect to search a pendulum in the end phase, Majester ef detach a material to summon Luster from extra deck, contact fuse Majester and Luster into Dinoster, Dinoster ef summon Luster from grave