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Magic: The Gathering Comprehensive Rules Changes

Planar Chaos to Future Sight (Single Change View)

General changes

Old rule (Planar Chaos) New rule (Future Sight)

212.1b.

When an object's type changes, the new type(s) replaces any existing types. Counters, effects, and damage affecting the object remain with it, even if they are meaningless to the new type. Similarly, when the subtypes of one of an object's types change, the new subtype(s) replaces any existing subtypes of that type. If an object's type is removed, the subtypes of its old type don't exist in any way under the new type. Those subtypes disappear completely for the entire time the object's type is removed. Removing an object's subtype doesn't affect its types at all.

212.1b.

When an object's type changes, the new type(s) replaces any existing types. Counters, effects, and damage affecting the object remain with it, even if they are meaningless to the new type. Similarly, when one or more of an object's subtypes changes, the new subtype(s) replaces any existing subtypes from the appropriate set (creature types, land types, artifact types, enchantment types, or spell types). If an object's type is removed, the subtypes correlated with that type will remain if they are also the subtypes of a type the object currently has; otherwise, they are also removed for the entire time the object's type is removed. Removing an object's subtype doesn't affect its types at all.