When Darkheart appears, the screen will be tinted green and he will give all players a random curse when the timer reaches 0:54 and every 4 seconds thereafter. Before applying curses, he will talk for 2 seconds, signifying the effect he's about to apply. Darkheart has a chance to cancel the current curse. Darkheart can give players one of the following curses:
- 50% Bound debuff
- 100% Bounce buff
- 50% Slow debuff
- 100% Vulnerable debuff
- Swap 2 players' positions
- Fling all player's in different directions
- Set all HP values to a random amount between 30 and 200