I was wondering what offerings I should offer the Goddess Morrigan? I feel a very strong connection to her.  Usually I'll just light some incense as an offering for her,  but I want to know what kind I should use.

Morrigan Incense

1 oz musk amberette
1/2 oz dragon's blood
4 drops patchouli oil
4 drops civet oil
4 drops of blood from your own finger

Blend during the dark of the moon, put in a jar and bury
in the earth for 6 weeks (a flower pot of peat in a cool cupboard will do).

Is there an alternative to blood? I wouldn't feel comfortable with that.

menstrual blood is usually what you would use... but like many things, you can probably sub it for more dragon's blood....or omit it completely.  At least, thats what I'd do.