Ayaka, Sword of Swift Frost

First strike, Swordswoman's skill - (Whenever
Ayaka kills a creature, put a +1/+1 counter on it and
draw a card. If there are 5 or more +1/+1 counters on Ayaka, it perpetually gains double strike and
Vigilance.)

Noncreature spells you cast cost {1} less to cast for
each card you have drawn this turn.