Variable based boost:
1- First event, setting the state on actor 1 and variable 10 to 0
2- Setting variable 10 to 10
3- State 4 (poison) notebox
4-Menu before speaking to event 1
5-Menu after speaking to event 1 but before speaking to event 2
6-Menu after speaking with event 1 and 2.
In this example I used the full "$gameVariables.value(10)" command, but you can use "v(10") for the same effect.