Welcome to the forum!
It depends on you as the practitioner an how you d the working. Marbas is known as a healer, you would set your intention for the working to be a cure not just symptom masking.
Please do make your next post your Introduction HERE, which we need per the forum rules and see our posting guidelines in the FAQ.
Points to cover:
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Do you have any practical experience in magick?
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If so, what exactly do you practice and how long have you practiced?
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Do you follow any specific system or tradition?
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What are your areas of interest?
Here is a getting started with magick guide. You’ll want to get your spiritual hygiene sorted out, and start work on developing your astral senses, then when you can know you have a decent chance at avoiding impostors and parasites then try the first contact guides we have on here.
For reference:
The rules are here
The posting guidelines are here in the FAQ