Later that night, Shredder let them loose in the city, telling to "go play", which they did by tipping over cars, knocking down telephone poles, and trashing buildings. Tokka quoted to Rahzar "Master said have fun". After doing a report on the devastation the next day, April O'Neil was confronted by the Foot with a message for the Turtles: If they didn't meet the Foot at a construction site near the docks that night, Shredder would set Tokka and Rahzar out again into Central Park. As many people would get hurt, the Turtles and Splinter agreed that there was no other choice but to face Shredder, regardless of their disadvantage against Tokka and Rahzar's immense strength. However, the professor had a plan; with the help of Donatello and Keno and using the contamination in the ooze that mutated Tokka and Rahzar as a basis, Dr. Perry prepared an anti-mutagen to de-mutate them, which had to be ingested.