Rune Eye, Chitterbit Sentinel

Persist (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.)
When Rune Eye, Chitterbit Sentinel enters the battlefield, create a 1/1 green squirrel creature
token.
{p/b}{g}: Remove a -1/-1 counter from target
creature you control.