User blog comment:BF10/PvZ2 Top 15 Plants and Zombies: Hurt and Heal/@comment-25029082-20151221165952

Looks like we found the Time Twister! Again!

You must kill one plant or zombie on each side if you want health limits to 30 again instead of 20 on that side. All health of plants and zombies are restarted to 15.