Kiriko, Protector of Kanezaka

Kiriko, Protector of Kanezaka costs one less to
cast if you control at least one creature.
{w}{1}: The next time a source would deal damage
to you and/or one or more of your creatures,
prevent that damage.
{2}: Creatures you control get +2/+2 and the cost
of their abilities is reduced by half, rounded
down, until end of turn. Activate only
once each turn.