1) Deceptive 2) Illusory 3) Unreal 1) Hallucinatory 2) Illusory 3) Unreal 
Illusive is the adjective form of illusory. Illusive may also refer to: ...
• (a.) Deceiving by false show; deceitful; deceptive; false; illusory; unreal.
Il·lu'sive adjective [ See Illude .] Deceiving by false show; deceitful; deceptive; false; illusory; unreal. « Truth from illusive falsehood to command.» Thomson. 
[adj] - based on or having the nature of an illusion
illusive That which tends to illude or deceive by unreal appearances; productive of illusion or false impressions; deceptive; illusory.
illusory adjective based on or having the nature of an illusion; `illusive hopes of finding a better job`; `Secret activities offer presidents the alluring but often illusory promise that they can achieve foreign policy goals without the bothersome deba...