If the stars align and conditions permit a descent, start by heading up to the Courvercle hut, which is reached via a 2 hour skin from the Glacier de Leschaux.

Get a very early start the next morning and pass under the south-east ridge of the Aiguille du Moine to reach the Glacier de Talèfre. Skin up this, staying left and passing under La Nonne, L'Éveque Le Cardinal before traversing into the (often large) bergschrund at the foot of the Whymper Couloir.

Cross the bergschrund on the right then climb a short couloir above before following a ramp out left into the main couloir. Boot up the couloir (which is not technically difficult but is steep enough that a fall would be disastrous - keep concentrating) to reach the col between the Aiguille Verte and the Grand Rocheuse.

From here either ski back down the couloir (abseiling any unskiable mixed ground in the lower section) down to the bergschrund, or ditch your skis and climb up to the summit of the Aiguille Verte itself via an exposed and often icy ridge. Chamonix mountain guides traditionally say that you are not a "vrai alpinist" (a real mountaineer) if you have not stood atop the Verse, so the detour is well worth it for the kudos and staggering views.

Whether you detoured to the summit or not, abseil over the bergschrund and ski back to the hut. Toast your success and then ski back down to the Glacier de Leschaux and continue down the Vallée Blanche to the Montenvers train.