This is an image of one of my Hammer amulets. The reader will notice the Calc Rune, the 31st stave of the Northumbrian Futhorc and one of the Graal Runes. It is also the Yr Rune of the Armanen Futharc and the Younger Futhark. In the latter two traditions the Rune is connected with the yew tree, a symbol of death to the Germanic tribes and thus became known as the Todesrune. However this is a superficial understanding as after death or passing away there is new birth so this is really a Rune of transformation.
The Ogham few that relates to the yew tree is idad, the 20th and last few which I think is significant. The Anglo-Saxon rune Eoh and the Common Germanic Eihwaz also symbolise the yew and appear one third and one half of the way through the Futhorc/Futhark. However in the Younger Futhark Yr appears at the very end and this gives a kind of finality to the meaning of the rune which is not present in any of the three rune poems although interestingly the Abecedarium Nordmannicum does say "Yr al behabet (Yew holds all) which I interpret to mean death.
This meaning is supported by the corresponding Yr rune of the Armanen Futhork. Guido von List calls this the "error-rune" (Irr-rune). He summarises for this rune: "Think about the end!"-very worthy advice! (See The Secret of the Runes)
The yew tree may be found in most ancient English church yards as these were usually built upon sites that were considered sacred to our ancestors. The yew was undoubtedly a sacred tree and the Celts for instance forbade their damage or destruction:
"Assemblies were held under these venerated trees, and it was tabu to damage them in any way." (Pagan Britain, 1967, Anne Ross)
Calc represents the mead horn and thus is the container for the sacred divine fluid. The mead symbolises both divine inspiration but in a magical sense also the divine essence of the Gods. When we partake of the mead, sanctified by the Hammer of Thunor we share in the essence of the Gods. The xtian church stole this concept from Germanic heathendom and they call it communion or mass. Calc also represents the downward plunge of the Arya from the world of life-giving spirit into dense matter which is subject to decay and death. However in turn Calc reminds us of our eventual return to our former and truer eternal state.