Text (UL+errata): 0/0. ; ~this~ enters the battlefield with two +1/+1 counters on it. ; {X},{Tap}: Remove all +1/+1 counters from ~this~ and put X +1/+1 counters on it. [Oracle 2009/07/08]
It does not kill itself when the ability is used. It is not 0/0 long enough to be killed. [Urza's Legacy FAQ 1999/02/03]