How did Lord Vishnu ended his Rama Avtar ?
For ending his avtar,he send a monk came there to see Lord Rama with an excuse that he had to tell him a important matter during he say that matter to the lord,nobody should interrupt them.If somebody interrupts them,rama should kill that person himself.So Rama made Laxmana the guard.Monk told rama that its time for his return.At that time’Durvasavu'( the angry formof Lord Shiva)and he had an excuse that he had a fasting for 1000 years and he has now completed it.so he wanted rama to give him the food.So Laxmana had to interrupt him.rama didnt want to kill Laxmana.to fulfill the promise of his brother,he drowned himself in the river sarayu.Rama became dusp and he himself drowned in river sarayu.