first of all, thorn carparace gives
![Life :life](https://elementscommunity.org/forum/Smileys/solosmileys/../../../images/Misc/life18x18.png)
CC.
This card fits better as a spell.
Without this being a spell: Ray of Light + leaf dragon + Root of Life + mitosis.
enables you to send back all permanents every turn. Which is essentially a mass-eternity for permanents.
Even if that costs too much:
you can completely deny both players from playing anything, giving the win to the one with the most damage.
Also, I'm going to have a neverending Dim shield chain with this.
I have no idea how to bypass these points. If they are significant enough.
EDIT: how about only allowing to remove 1 permanent from each stack?