Mam Tor Stone is an altar offering mystery in Snotinghamscire in Assassin’s Creed Valhalla.
Your only objective is to offer three titanium to the altar.
Here’s a walkthrough of Mam Tor Stone in AC Valhalla.
To begin the event, get to the location shown below, marked by the map marker.
Get to the altar and offer 3 titanium.
You should be able to find titanium from chests especially during raids.
The offering altar mystery completes here. You will only earn 1 skill point as a reward.