Proteus, First Born

Proteus, First Born has all activated abilities of all creatures that share a creature type with it.
{u}: Choose a creature type. Until end of turn, Proteus, First Born is the chosen type in addition to its other types.
You have literally as many forms as Proteus; and now you go all manner of ways, twisting and turning, and, like Proteus, become all manner of people at once... -Plato, Ion