Battleaxe of the last Waaagh

Revered subject of the Orc myth of the end of everything when Gork's (or possibly Mprk 's) chosen Best Boss Ragnor goes mad with an axe and destroys the whole world. This is the famous Orcish day of Ragnarok
In close combat the bearer receives a potentially whopping +D6 Attacks - roll randomly each combat round to we just how crazed the wielder is that particular turn. On a 6 the favour of Gork tor possibly Mork) is withdrawn from the wielder once his attacks have been resolved - the Battleaxe of the Last Waaagh! then ceases to work at the end of that Close Combat phase.