Gouken, Supreme Sensei

Mentor, Vigilance
At the beginning of each combat, each creature
you control with one or more +1/+1 counters
gains Mentor until end of turn if Gouken,
Supreme Sensei has that keyword and that
creature doesn't. The same is true for Vigilance,
First Strike, Reach and Hexproof.
"Concentrate not on destroying your foe,
but on attaining your own victory."