The little fellow on the high path

Shamus the leprechaun stands on the high path of the grasslands and knocks Dizzy back every time he comes near.
Nudge 1Where to look
He's a leprechaun. What would an Irish leprechaun treasure above all?
Nudge 2A stronger push
Something solid gold and lucky, guarded deep in the diamond mines.
What you needOther problems to solve first
Solve these first (each opens its own page, no answers on the way):
Show the solutionThe whole answer, with a video
Bring the solid gold Irish shamrock from the mines (The dragon's den) and drop it in front of Shamus. He catches it and lets Dizzy by for good. Behind him, on the path, lies a dry match.