Ba'rûn, Queens Champion

Haste, menace, vigilance
Cheers of the Arena- When creatures you control enter the battlefield add X +1/+1 counters to Ba'rûn, Queens Champion (X being the mana cost of those creatures).

Survival of the Arena- When an opponent casts a creature spell create a copy of that creature, and
Ba'rûn Queens Champion gains indestructible until opponents endstep.