I’ve got a similair thing in my game.
The hero goes into the cemetary and the bats attack him.
When they are dead the hero leaves and the come back to life when he returns.
I put a floor switch ajust after the entry door which activates the bats
first bat. when he dies the other 3 are activated.
This gives a cool way to have enelies coming in groups and every time that ypu enter the level. (no variables or token to count either) 😉