Ir really does not feel nice when you have game under control and then in a sequence of 5 turns with random effects and topdecks you your oponent survives and then wins the game. I mean, it can happen, but it happens too often…
My favorite is when you choose a class like Priest and while you are in the card selection phase your choices are things like, “draw a weapon” and “when you discard…”… nothing like knowing you’re fighting a losing battle before the game even starts.
I think Sunwell is the worst. And it usually comes from discover spell…