Spectral Arrow
minecraft:spectral_arrow
Obtained by crafting, in loot chests (Bastion Bridge, Bastion Other, 1 more), by bartering with piglins.
How to get it
Crafting 
→ 2
2 Spectral Arrow
📦 Found in chests
Bastion BridgeBastion OtherBastion Treasure
🎣 Other sources
Piglin bartering ×6–12