405.2a.

A static ability is a characteristic-defining ability if it meets the following criteria: 1) It defines an object's colors, subtypes, power, or toughness; 2) It is printed on the card it affects, it was granted to the token it affects by the effect that created the token, or it was acquired by the object it affects as the result of a copy effect; 3) It does not directly affect the characteristics of any other objects; 4) It is not an ability that an object grants to itself; and 5) It does not set the values of such characteristics only if certain conditions are met.