Leonardo, Ninja Turtle

Double Strike, Trample
Ninjutsu {1}{w}
Tag In: Scry 3. Draw one card. Put six -1/-1 counters on up to two creatures controlled by opponents.
Tag Out: Place four +1/+1 counters on up to two creatures you control. Entering creature gains "{w/u}: Add one instant or sorcery from your library to your hand (OPT)".

Partner (You can have a second commander as long as it has 84 in its subtype)