Thanks Yann, you answer confirm that this is not the way to go for me.
What I want is to be able to click on a card, retrieve it's value/suit, then destroy it or drag it across the screen.
The array method gives me the value with a mathematical "trick" but doesn't get me the spawned object id.
Now I just started in construct, so I'm not really sure if it's even possible to have an event like:
onclick spawned_object_10 do something..
As I see it he only way would be to load each card as a different object and then using a randomized array spawning them on the screen, keeping each of them indipendent.