Feild Medic

Defender
{x}{t}, Feild Medic gains X +1+1 counters
Feild Medic enters the battlefield with X
+1+1 counters on it
-Feild Medic is a 1/1 with x +1+1 counters
-When a creater you control would die, you
may put X
+1+1 counters on that creater