The choice of increasing ATK or DEF on the equipped monster is determined when “7 Completed” is activated.
If “7 Completed” is equipped to another legal target by “Fairy’s Hand Mirror,” the choice of increasing ATK or DEF by the effect of “7 completed” does not change.
If “7 Completed” is equipped to another legal target by “Tailor of the Fickle,” the choice of increasing ATK or DEF by the effect of “7 Completed” does not change.