Metamorphic Alteration

You can choose only a creature on the battlefield.

Metamorphic Alteration copies exactly what is printed on the chosen creature (unless that creature is copying something else or is a token; see below). It doesn't copy whether that creature is tapped or untapped, whether it has any counters on it or any Auras and Equipment attached to it, or any non-copy effects that have changed its power, toughness, types, color, or so on.

The characteristics that will be copied are determined as Metamorphic Alteration's effect first begins to apply. If the copiable values of the chosen creature change later, or if that creature leaves the battlefield, the enchanted creature's characteristics are unaffected.