If a token copy of Flickering Spirit uses its activated ability, the token will not return to the battlefield, because of the rule that says tokens that leave the battlefield can't return.
25-09-2006
wotc
When the ability resolves, Flickering Spirit is exiled, then immediately returned to the battlefield. It returns as a "new" creature. Any counters, Auras, and so on are removed. Any spells or abilities targeting Flickering Spirit no longer target it.
25-09-2006
wotc
If Flickering Spirit's ability is activated, any "as this enters" choices for it are made by its owner, not its previous controller.
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