Glen Elendra Archmage + Sage of Fables

[Offler]

Is there any chance to remove +1/+1 counter while glen elendra returns via persist before those +1 and -1 counters negate each other?

[cdr]

Counters "negating each other" is a State-Based Action - it happens before anyone gets priority.

You can find a list of SBAs here: http://yawgatog.com/resources/magic-rules/#R704

[Offler]

Then it works exactly I expected, just some people attempted use proliferate spells in attempt to kill Glen elendra