Mirage, Delightful deceiver

You may have Mirage, Delightful deceiver enter
the battlefield as a copy of a permanent you control,
except it's legendary in addition to its other types
and, if it's a creature, it enters with two additional
Secret counters on it and has "{3}remove a secret
counter, Mirage, Delightful deceiver becomes a
copy of a permanent you control, except it's
legendary in addition to its other types"