The change of control happens before new targets are chosen, so any targeting restrictions such as "target opponent" or "target creature you control" are now made in reference to you, not the spell's original controller
[spoiler="Sly Maiden"][/spoiler] After it successfully destroys a monster you can take a random card from your opponent's hand and add it to yours
searching for two copies of "Jizukiru" and a copy of "Carnot the Eternal Machine" in order to board break and make a Rank 10 play at the same time
Its presence created degenerate play patterns that other decks werent equipped to deal with consistently

Attack!" When Nash activates the first effect of that monster, he announces, "Surfacing Big Jaws activates its effect from my hand!" When Nash activates the second effect of that monster, he announces, "Surfacing Big Jaws activates its effect when its Summoned!" When Nash Summons "Tripod Fish", he announces, "Tripod Fish!" Most of the time when Nash declares an attack with that monster, he announces, "Tripod Fish attacks!" When Nash activates the effect of that monster, he announces, "By reviving Tripod Fish, its effect activates!" When Nash Summons "Xyz Remora", he announces, "Come out, Xyz Remora!" Most of the time when Nash declares an attack with that monster, he announces, "Attack, Xyz Remora!" When Nash activates the effect of that monster, he announces, "When Xyz Remora is Special Summoned, its effect activates!" Spells/Traps When Nash activates "Aqua Jet", he announces, "I activate my Spell Card, Aqua Jet!" When Nash activates "Aqua Jet Surface", he announces, "I activate my Spell Card
