The penny drops.....

[alice_mccoy]

It is known that many ancient spells are activated by the caster travelling in a circle or circuit around the area or item to be affected by the spell.

http://www.bbc.co.uk/news/magazine-17270310

One really has to marvel at helpful_mammal's sheer vision, determination and tenacity.

Also at

Comments

[helpful_mammal]

Thank you.

I have to destroy it before it kills me first.

When I complete the circuit, all remaining tarragon plants will be sucked dry by flaming demon greenfly. They in their turn will be devoured by an army of robot ladybirds, which will then crumble to rust.

Tarragon is evil I tell you.