To kill Will-o-the-Wisps in Oblivion Remastered, you need to use damage types that bypass their immunity to normal attacks. Specifically:

• Use magic spells that deal elemental damage (e.g., fire spells).
• Use enchanted weapons that have elemental or magical damage effects.
• Use silver or Daedric weapons , which can damage them.
• If skilled enough, hand-to-hand combat at Journeyman level (skill 50+) can also harm them.

Normal weapons without enchantments will do no damage to Will-o-the-Wisps, as they are immune to conventional attacks

. Combat Tips:

• Will-o-the-Wisps drain your health and magicka if they get too close, so keep your distance when attacking, preferably using ranged magic or enchanted bows.
• Hit them repeatedly as they approach, then back away quickly to avoid their draining attacks

• Using the Reflect Spell effect or potions can turn their drain attack back on them, healing you instead

• They are commonly found in caves and near the Azura Shrine, often around level 22 areas like Grey Rock Cave

Rewards:

• Killing a Will-o-the-Wisp yields Glow Dust , a valuable alchemy ingredient used for potions like Reflect Spell and required for activating the Shrine of Azura

In summary, to effectively kill Will-o-the-Wisps, rely on magic or enchanted/silver/Daedric weapons and maintain distance to avoid their draining attacks. This strategy ensures you can defeat them and collect Glow Dust safely.