Mothmen (OD&D Class)
One of my backburner ideas is an OD&D campaign where all player characters can fly, thus making the aerial combat rules the "default" combat system. Mothmen would serve to replace MUs. I'm imagining an "arcade mode" style, thus maxing out at 5th level, but it could easily be extended using the MU progression.

Mothman
Mothmen are human-sized sentient moths that can cast spells from the Magic-user spell list. They cannot effectively use weapons or armor, but have a base AC of 7 due to their carapace.
Saves are as an MU of the same level. In the presence of bright lights, Mothmen must save vs. Spells or veer off course in the direction of the light source.
| Rank | XP | HD | Spells |
|---|---|---|---|
| Chrysalid | 0 | 1d4 | 1/-/- |
| Seer | 2,500 | 2d4 | 2/-/- |
| Lepidopt | 5,000 | 3d4 | 3/1/- |
| Witch | 10,000 | 4d4 | 4/2/- |
| Harbinger | 20,000 | 5d4 | 4/2/1 |
Mothman subtypes get special powers. Spells listed below can be cast in addition to the usual allotment of spells.
| d20 | Subtype | Effect |
|---|---|---|
| 1 | Atlas | +1 HP/HD |
| 2 | Sunset | Charm Person |
| 3 | Sphinx | Prehensile proboscis extends 12' |
| 4 | Vampire | Can drain blood from corpses to restore 1 HP |
| 5 | Polyphemus | Discombobulate (affects [Level]d4 HD) |
| 6 | Tiger | Immune to freezing & cold |
| 7 | Silk | Can produce 50' of silk rope per day |
| 8 | Hawk | Can hover in place |
| 9 | Comet | Invisible to creatures using Infravision |
| 10 | Ghost | Can cast Cure Light Wounds |
| 11 | Luna | Invisibility |
| 12 | Death's Head | Curse |
| 13 | Leaf | Speak with Plants |
| 14 | Ornate | Phantasmal Forces |
| 15 | Grease | Grease |
| 16 | White Witch | Can glide 2 extra hexes |
| 17 | Mother Shipton | Cosmological Query |
| 18 | Magpie | Locate Object |
| 19 | Burnet | Detect Magic |
| 20 | Winter | +5% XP |