When casting a card with Surveil, you have the option to select “not now” instead of surveiling. Fine.
But if you do Surveil, you MUST select and discard the appropriate number of cards.
I’m not sure if that is correct, since the point of Surveil is to filter your draws. If you like the cards you are going to draw, you should not be forced to discard them.
I’m surprised you even have the option to skip the surveil part at all, I was expecting it to happen all the time from reading the tooltip on it. I dunno if being able to see what your next 4 cards and then cancelling it would be too helpful, to let you plan quite a few turns in advance.
Well, in paper, surveil lets you look at the top X cards of your library and choose to put any or all of them back on top of your library or in your graveyard. So you can use it just to see what’s coming up.