Ru, Caring Companion

First Strike, Flying, Vigilance
Whenever Ru or a creature you control blocks,
you may pay {w} and {r} any number of times. For
each {w} paid, reduced the damage that would be
health to target creature by 1. For each {r} paid,
Ru deals 1 damage to target creature you don't
control.
Dash {2}{r}