Pouch of Nulldust

Once per battle, at the start of the hero phase, you can say that the bearer will use their Pouch of Nulldust. If you do so, until the end of that phase, unmodified casting rolls that include a double 1, double 2 or double 3 are treated as miscasts or, if a primal magic dice was rolled as part of the casting roll, as primal miscasts. In addition, roll a dice for each endless spell on the battlefield. On a 5+, that endless spell is dispelled.