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@plixel @Rodeo
The way I'm doing in my game is by
1. Using a Signals.gd script

2. Add that script to Project settings > Autoload, this makes the script globally accessible (singleton)

3. Then from the scene I want to send the signal, I do
Signals.my_signal_was_triggered.emit(<optional variables here>)

4. Then on the scene/node (can by multiple) I want to receive the signal emission, I do
Signals.my_signal_was_triggered.connect(my_function)

5. Create the function "my_function"