"Unearthly and invisible fibers emanate from this sphere, entangling all who draw near."
—Arcum Dagsson, Soldevi Machinist

Masters Edition IV

Vibrating Sphere

As long as it's your turn, creatures you control get +2/+0.
As long as it's not your turn, creatures you control get -0/-2.

During your turn, creatures you control get +2/+0.
During turns other than yours, creatures you control get -0/-2.

During your turn, all creatures you control get +2/+0. During all other turns, all creatures you control get -0/-2.