The Wandering Minstrel

Lands you control enter untapped.

The Minstrel’s Ballad — At the beginning of combat on your turn, if you control five or
more Towns, create a 2/2 Elemental creature token that’s all colors.

{3}{w}{u}{b}{r}{g}: Other creatures you control get +X/+X until end of turn, where X is the number of Towns you control.