Rhys, the Evermore (PECL) (32p)

Flash When Rhys enters, another target creature you control gains persist 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.) {W}, {T}: Remove any number of counters from target creature you control. Activate only as a sorcery.