1)omg a wolf (lycan in shapeshift) is coming to kill me. - song of the siren.
2)omg song is on CD - NET
3)omg et also on CD - illusions and kill that else w8 and hold him while nets CD finishes
4)illu also on CD - riptide 1 hit and juke and kill him
5) hes 1v1 cming how to defeat him -as soon as he comes make illusions and cast riptide and keep on hitting him. if he kills all illusions and his ultimate ended try to juke him and kill wolves by riptide. if u have manta u can cast it also for prolonged illusion confusion. with this all his hp will drop fast. if he tries to ulti and escape cast net on hima nd kill him but if he survived with very low hp or u have very lwo hp and hes chasing then cast ur ultimate i.e. song of siren and then go to him and kill him/flee
As others have said, Naga Siren. If he has BKB and it's a teamfight you can use Song of the Sirens to sleep everyone but him (since he's magic immune) then you can 5v1 him and his team will be easy pickings afterwards.