Lexx, Cryptic Cadaver

Undying (When this creature 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.)
{u}, Sacrifice Lexx: Counter target instant spell.
{b}, Sacrifice Lexx: Target player discards a card.
A mystery that prevails even death itself.