Cyclone

Cyclone is a type of status effect that cause the afflicted to be lifted up, completely disabling units, but also rendering invulnerability and untargetability, like a banish. Direct HP Removal damage will still deal damage to a cycloned unit, with the exception of Invoker's EMP.

Sources of Cyclone

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Some spells have a cyclone as a component, like Torrent or Ravage.