I  noticed this while testing, this happens only if you use a few Frosty towers with Frosty Power. If the enemy survives long enough until the end of the channeling and another frosty is close to the enemy, it can happen that another frosty will buff this frosty. Which can lead up to that the buffed up frosty can also buff up other frostys and so on. With that it is easily possible to reach hundred of millions or billions of damage on towers with well placed frostys.

Steps to reproduce:

• start the game
• start a map
• place a defense near where enemys will spawn
• place a few frostys around it but so that enemys will be close to these frostys
• notice that after a channel ends and a frosty is targeting a monster close to another frosty the DPS will increase because the frosty gets buffed

Expected result:

Frostys don't buff other Frostys.