BANEFUL INGREDIENTS AND USES
This is a list I have compiled and have created. With the herbs, they must be negatively charged, just like anything else. Tell them what to do and charge them with your intent. Herbs have polarity, they can heal but they can also hex.
Angelica root - misery, strife, distress
Asafoetida - drives enemies away
Blueberry - confusion, strife
Catnip - distraction, loss
Chickory - to sow discord
Chili powder/flakes - discord, spicy misery
Foxglove - causes, nightmares, vanity
Gardenia - seal their love life
Hemlock - discord, misery
Lavender - depression, insomnia
Mandrake - misery, strife
Mint - visions, nightmares
Mistletoe - serious harm, anxiety, confusion
Mugwort - nightmares, hallucinations, paranoia
Nightshade - nightmares, anxiety, sickness
Poppy seeds - discord, nightmares
Rose - tempt into cheating
Rosemary - nightmares, insecurity
Spanish moss - bad luck, binding
Tobacco - substitute for (most) any baneful herb
Wormwood - misery, strife
OTHER INGREDIENTS
Glass shards - reflect transgressions, to cause harm
Sharp objects (pins, needles, thumb tacks, thorns, etc) - damage, cause harm
Glitter - make their problems stick to them
Price tags - Debt, financial troubles
Dead battery - drain their energy
Vinegar - to sour, to rid yourself of them
Charcoal - block their vision, lack of clarity
Cover hex jar with tin foil - make victim feel isolated and alone
Googly eyes - evil eye, to make them always feel watched, paranoia
Agar or Pectin - stick their problems to them, cause them stagnation
dog/cat shit - to shit on their life (energetically sever the connection to your pet though)
Cigarette butts - to cause addiction and troubles
Salted earth (just combine hydrophobic soil and salt) - dry up their resources, cause infertility
Nasty bong water - it's gross, need I say more?
Citric Acid - to pucker, to get them to stfu.
Pro-tip: use ingredients your target is allergic to. This can really help make a powerful hex, especially if they are allergic to nuts and go into anaphylactic shock or have any other extreme adverse reaction.
Any herb CAN be used banefully. Any crystal CAN be used banefully. First see what the herb/crystal is used for and, well, reverse it. Love => loneliness/loss of love. Peace => paranoia. Dream work => nightmares. Mental Clarity => delusions. All you need to do is negatively charge them. Tell them what to do and focus your rage and hate into the herbs/crystals to charge them up.
For more information on baneful ingredients, spellwork, and other herbs' uses, check out The Cobalt Athenaeum discord server!