Might of the Masses

Oracle Text

Target creature gets +1/+1 until end of turn for each creature you control.

Card Rulings

6/22/2015 The bonus is determined as Might of the Masses resolves. It won’t change if the number of creatures you control changes later in the turn.
6/22/2015 If you target a creature you control with Might of the Masses, remember to count that one when determining the amount of the bonus.