Steps to Reproduce:
1. Play a game in which the opponent has Mana Constrictor in their deck.
2. Have the opponent play a Mana Constrictor.
3. Attempt to play the card affected by Mana Constrictor with the amount of mana the card displays.

Actual Result:
Player is unable to play the affected card, as the cost has increased but the card does not display the updated cost.

Expected Result:
The card affected by Mana Constrictor's debut shows the raised cost.