ok. ive come to a place in my story where my charter encouter the first boss battle.

i have asword statue event, how can i do that when my charter touch the sword statue, a sword is placed in invetory, and right after the sword is taken. the sword statue should change to another sword statue but this statue has no sword on it.. so directly. a cahnge of event picture. and when the sword is taken and the statue change. my party should be trown into a boss battle and afther the battle the event can never occour again.

how can i do this?