[2020] Mystical Dispute is showing up as one mana in the start of the match. It later let me cast it for one mana against a white spell

The rule for predicting cost adjustments accidentally removed all checks for zone constraints (instead of just the ones about "this spell" - it's not a spell until it's on the stack!). So basically Mystical Dispute is predicting it cost 2 less if there was a blue card anywhere in the game. Oops! I have a fix, but it probably won't be live for a while, especially as it doesn't affect gameplay much (just gives you stops if you can afford U and your opponent controls a spell...) #wotc_staff