Where can I find Defense strengthening in Erpel?

Defense strengthening can also be found in these cities:

Alfter Andernach Bad Neuenahr-Ahrweiler Bonn Bornheim Hennef (Sieg) Hünxe Königswinter Linz am Rhein Meckenheim Neuwied Sinzig Swisttal Waldbreitbach

You can also find this in Erpel:

Spread Sweet Food For A Low Cholesterol Diet Fruit Juices Hair Conditioner Shaving Gel Hand Care Deostick Magnesium Cold Tea Ginkgo