Teddy, Font of Progress

+2: Until your next turn, Teddy, Font of Progress becomes an X/X green Bear creature with menace, where X is the number of lands you control.
-1: Target creature with 4 or more power gets -X/-X, where X is the number of lands you control. If that creature would die this turn, exile it.
-6: You get an emblem with "Lands you control are 3/3 Elemental Bear creatures with indestructible and hexproof. They are still lands."