I found a 6th chest in VOG I have collected it once but like the 5th chest you must do something specific to make it spawn and we dont know what we did. EDIT - I will post a video of the 6th chest location by I have yet to find out what makes it spawn so if you guys find out please post
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extra chest for stopping templar from teleporting. not easy, but not impossible. as for the rabbit hole next to the spirit bloom chest you drop down, you can reach that chest with out going down it but I personally enjoy the rabbit hole technique as it lands you directly at the chest.