Keeper of the Beasts

Oracle Text

G, T: Choose target opponent who controlled more creatures than you did as you activated this ability. Create a 2/2 green Beast creature token.

Card Rulings

10/1/2009 A different opposing player may be targeted each time the ability is activated.
10/1/2009 It is only necessary that the condition be true as you activate the ability. The ability will still resolve normally even if the condition is no longer true at that time.