Na Kali, Centaur Knight

Na Kali, Centaur Knight can not be countered.
Mentor 3 (Whenever this creature attacks, put a
+3/+3 counter on target attacking creature with lesser
power.)
Whenever two or more creatures you control
dealt combat damage to a player this turn, create
a 0/1 green creature token with; Soulbond —
As long as this token is paired with another
creature, both creatures have trample.