Kamisato Ayaka

Whenever Kamisato Ayaka deals combat damage
to a player, you may pay {s}{s}{s}. If you do, put
one ice counter Kamisato Ayaka.
When Kamisato Ayaka has 6 ice counters, tap all
of target opponent's creatures until Kamisato
Ayaka leaves the battlefield and Kamisato Ayaka
gains indestructible and hexproof.