2022-02-18 : A creature that is equipped is considered modified no matter who controls the Equipment that's attached to it.

2022-02-18 : A creature with a counter on it is considered modified no matter what kind of counter it is or which player put it on that creature.

2022-02-18 : An Aura controlled by an opponent does not cause a creature you control to be modified.

2022-02-18 : Only creatures can be modified. If a modified creature stops being a creature, it is no longer considered modified.