Artifact, 4 (4) {2}, {T}: Move target counter from one card to another. If the second card's rules text refers to any type of counters, the moved counter becomes one of those counters. Otherwise, it becomes a +1/+1 counter. Only a villain would unleash a giant fan on anyone!
Illus. Randy Gallegos
You must move the counter to a different card than it came from. [QAS 1998/09/09]
If there is a choice of what type of counter you can put on the card, then you choose from the legal types. [QAS 1998/09/09]
Tokens are not counters. [Barclay 1998/08/13]
Remember that Cumulative Upkeep is kept track of by counters. [Barclay 1998/08/13]
If Giant Fan's ability is countered, put a "counter" counter on it. [Barclay 1998/08/13]
Optional Rule: You can also turn the counter into any type that is already on the card (a Corrosion or Meddling counter for example). [Barclay 1998/08/13]
All tournament formats have banned cards from Unglued.
Unglued
(Rare)