Loyal Cathar states:
When Loyal Cathar dies, return it to the battlefield transformed under your control at the beginning of the next end step.
Undying Evil states:
Target creature gains undying until end of turn. (When it dies, if it had no +1/+1 counters on it, return it to the battlefield under its owner's control with a +1/+1 counter on it.)
If I cast Undying Evil on Loyal Cathar and it dies, would it come back as a Loyal Cathar with a +1/+1, come back as its transformed self, come back transformed AND with the +1/+1, or some other combination that I'm not seeing?