If you are an ethical practictioner of magic, you will have done your research, checked your motivation, gathered your materials, acquired permission to do the spell (if you are working on or for another) and worked for the greater good of all. In which case your spell will work, to the degree the universe considers appropriate. There are no real repercussions other than the standard Rule of Three.
If you are dabbling and/or randomly casting spells without the proper, research and knowledge, the spell will work, or not, depending on the how and what the universe chooses, and you will be subject to the Rule of Three.
the spell caster should get it back in ten folds
It spells Murder.
When a gatherer counter target spell, it means that the spell is prevented from taking effect or resolving, essentially nullifying its effects.
Garden.
The likely word is happens (occurs, takes place).
The correct spellings are 'happens' and 'occurs'.
Learning to spell.
The correct spelling is occurs (happens).
Ամեն ինչ պատճառով է լինում
they spell the alphabet and maybe you get a rare Pokemon
You will have a reaction which will then allow you to spell cough and syrup correctly.
You will feel a tickling spell which will last at least 10 seconds.