A paper talisman with a spell written on it. Because of their portable nature, ofuda are great to keep on hand for emergencies.
Might you need an escape?
Keep a portal spell with you.
Wounded in a fight?
A healing ofuda is what you should carry.
Make sure you keep a few protection talismans on hand.
good paper from wood or cotton pulp
a brush made from real hair with a wood handle
solid ink ground and mixed with pure water at the time of creation
Freshness of the ink and paper quality are the most important component aspects for ofuda potency.
The spell caster's ability will also play strongly into efficacy.