You can defeat Will-o’-the-Wisps in Oblivion (and Oblivion Remastered) by using any damage source that is not “normal weapon damage” and by abusing their AI with hit‑and‑run tactics.

What Will-o’-the-Wisps Are Weak To

Will-o’-the-Wisps are immune to normal physical damage, so regular non-silver, non-enchanted iron/steel weapons will do nothing.

Use any of these instead:

  • Destruction magic (fire, frost, shock all work as long as it’s direct damage).
  • Enchanted weapons (with any elemental damage, make sure they have charge).
  • Silver weapons.
  • Daedric weapons (count as special material that can hit them).
  • Hand-to-hand at Journeyman (skill 50) or higher, which lets your punches count as magic damage.

If you have none of these, the safest “strategy” is actually to avoid them until you upgrade gear or skills.

Basic Combat Strategy (Hit and Run)

They drain Health and Magicka on touch, so letting them sit on top of you is what usually gets players killed.

Use this pattern:

  1. Engage at range
    • Start by hitting them with a ranged spell or enchanted bow if you have one.
 * Keep moving; do not stand still in their drain beam.
  1. Watch the drain beam
    • When they get close, they’ll pause and emit a visible “beam” or effect as they siphon you.
 * The moment you see that, back up to break the connection, then circle or sprint around them.
  1. Hit, then back off
    • Run in, land 1–2 hits with your silver/enchanted/Daedric weapon, then immediately dodge or sprint away before the drain ticks too long.
 * Repeat: strike → retreat → wait for it to drift after you → strike again.
  1. Use terrain and visibility tricks
    • They turn almost invisible in combat, but Detect Life or items like the Gray Cowl of Nocturnal make them much easier to track.
 * You can lure them over water; their position becomes visible via ripples on the surface, making aiming easier.

Defensive Prep Before Fighting

A little preparation makes them far less terrifying.

  • Stack magic resistance or absorption from sigil stones, enchanted gear, or spells so their drain hurts less and sometimes refills your magicka instead.
  • Carry restore health and magicka potions to recover between hit‑and‑run passes.
  • If you’re struggling, consider using chameleon/invisibility gear to control when you engage and to escape safely if things go bad.

Example Loadouts by Playstyle

Here are some simple setups that work well:

  • Mage character
    • Fire Destruction spell (on touch or on target), plus a backup ranged spell.
* Keep max distance, kite in circles, cast when the wisp pauses.
  • Melee fighter
    • One silver or Daedric melee weapon with elemental enchantment.
* Hit once or twice per pass, then roll/sprint through or away from the wisp before the drain effect stacks.
  • Hybrid/archer
    • Bow with elemental enchanted arrows or an enchanted bow, then finish in melee if needed.

Once you kill a Will-o’-the-Wisp, make sure you loot the Glow Dust it drops, which is used in alchemy and certain quests.

Information gathered from public forums or data available on the internet and portrayed here.