Raein, Primal War

Raein, Primal War costs {x} more to cast, where {x} is the total amount of creatures your
opponents control, and {x} less to cast, where {x} is the total amount of creatures you control.
Vigellence, Indestructible, First Strike, Trample,
Reach.
Put a +1/+1 counter on Raein, Primal War for
each other creatures you control.
When Raein, Primal War attacks, all other
attacking creatures get +1/+1 until end of turn
for each counter on it.