How can I overcome Manannan

Hint 1 of 5:

Are any of the spells in the catalog purfect for Manannan?

Hint 2 of 5:

If you can't slip him a Mickey, slip him a Felix.

Hint 3 of 5:

Maybe the cat cookie could be made to work.

Hint 4 of 5:

Have you visited the bear's home recently?

Hint 5 of 5:

The cookie can be disguised in the porridge.