Bring 50 Riekling Spears to Hilund

Walkthrough
Hilund the warrior at Thirsk Mead Hall, will be happy to be back here after Retaking Thirsk, but she wants to create a reminder of their initial defeat by the Rieklings requiring 50 Riekling Spears.

Bring 50 Riekling Spears to Hilund
Riekling Spears can usually be found on Rieklings, so visiting their dwellings on Solstheim, like the Bristleback Cave or at a small camp just east of Vahlok's Tomb should quickly get the required amount.

Note: A complete exploration of Solstheim yields about 350+ such spears.

Another method is to approach any group of Rieklings and let them throw their spears as you evade their spears ( they are pretty bad at aim ).

Bring the spears to Hilund and receive a gold reward.

Epilogue
After a day or so, Hilund will have stuck the spears into the ground, to the left and right of the Thirsk Mead Hall entrance.

Bringe Hilund 50 Rieklingspeere