I think the way to simplify it is to make it more like Tournament, with two sets of either/or's that lead to a positive outcome or a negative outcome. Here's my suggestion:
Planetarium, Action $3
+1 Action
Set aside a card from your
hand face down. The player
to your left may trash it. If
they do not, reveal it; if it is
an Action, play it three
times, otherwise discard it.
The four possible outcomes (+1 Action for each):
Trash an action card (bad)
Play an action card three times (very strong)
Trash a non-action card (sort of good)
Discard a non-action card (sort of bad)
I gave it +1 Action so that it doesn't have the "might be terminal" problem that makes it annoying to play. I also made it cheap because 3 of the 4 outcomes are not very strong, so you're swinging for the fences, but also have room to bluff.