thrilling discovery did not require discard step
my oponent plays a card that gives him the option to discard two cards and draw trhee cards hi didnt discard the cards but he or she draws three anyways
I had the exact same issue today. An opponent played Thrilling Discovery with no other cards in hand and drew 3.
Same thing happened to me just now. I cast the spell just to trigger magecraft and gain life. when it gave me the option for yes or no, I pressed yes because why not? Then I drew 3 cards.
This really needs to be fixed.