Shadow, the demon dog

Prevent all damage that would be delt to
Shadow, the demon dog, and put X +1\+1
counters on Shadow, the demon dog.
Shadow, the demon dog deals X damage
to target player who attacked or blocked
this turn where X is equal to the amount
of +1\+1 counters added this turn. this
abbility actevates as soon as damage would
be delt to Shadow, the demon dog. all combat
dealing with Shadow, the demon dog act as if
they had first strike.