Text (SA+errata): Exile target attacking creature. ; Cycling {5}{G}{W}{U}. ; When you cycle ~this~, exile up to two target attacking creatures. [Oracle 2009/07/08]
When you cycle, you can choose zero, one or two target creatures. [Shards of Alara FAQ 2008/09/23]
The "when you cycle" trigger is a separate ability from the Cycling and goes on the stack on top of it, so it will resolve first. [Shards of Alara FAQ 2008/09/23]
