I've finished the Divine Beast quests and heaps of side quests, but I've never received any more than a handful of ancient arrows. How can I buy or farm more?
Ancient Arrows can be obtained from:
- In 9 treasure chests in Hyrule Castle - three have 1 arrow, five have 3 arrows, and one has 5 arrows.
- At Akkala Ancient Tech Lab for purchase after reactivating the blue flame furnace as per Eduardo Melzer's answer.
- 1 arrow costs 90 Rupees, 2 Ancient Screws & 1 Ancient Shaft.
- 3 arrows cost 250 Rupees, 6 Ancient Screws & 3 Ancient Shafts.
- 5 arrows cost 400 Rupees, 5 Ancient Springs, 5 Ancient Shafts & 5 Arrows.
You can buy ancient arrows at the Akkala Ancient Tech Lab, after reactivating the furnace with blue flame