I love the idea of getting an Infinite Roots tattoo, @AliceInWonderdab! 
There’s actually another thread with some brainstorming going on called Three Cheers for Our Infinite Roots Coven. A few coven members with a talent for art have shared their designs for possible Infinite Roots logos/symbols 
As you consider possible designs for your tattoo, feel free to pop over there to find some inspiration! 
I love your tattoos, @IrisW! 
And oohhh- the cauldron design is a great idea, @Francisco! 