The process to be forgiven by the Elementals requires a wooden mask and a ritual to absorb the "woodsin" into it. The initial 1.0 Gridania storyline was made around that, specifically. Though I seem to remember not everything can be forgiven like that: sometimes the Elementals are just so pissed off they might even claim your soul if you die in the Shroud and make you into a Wildling (which is basically a thrall).
There was a thread somewhre around here discussing the Greenwrath and the Elementals that discussed those things, if you need more information.
There was a thread somewhre around here discussing the Greenwrath and the Elementals that discussed those things, if you need more information.