OK, here's my log of some combat encounters with mummies. This is all over about 12 turns -- flying + 3 moves sure is convenient. I went with pure Life because obviously that's the play when you receive all the benefits of Death for free. Of course mummies are "normal" units so I can throw heroism and discipline on them, which brings their stats quite close to what wraiths have.
2 mummies vs 2 giant spiders + 3 awakened trees
Result: 0 HP lost, trees raised as undead
4 mummies vs 2 cockatrices + 2 earth elementals (node battle, no spells cast)
Result: a bit of damage on the mummies, all enemies raised as undead
2 mummies vs 4 phantom beast + 3 phantom warrior (node battle)
Result: all enemies killed but it took 2 turns; no problem, since the mummies are flying
4 mummies vs 5 giant spiders (node battle)
Result: 2 mummies lost, 2 spiders raised as undead... tough one, but only because the spiders have 11 resistance in a node and could prevent the mummies from summoning for a couple turns
4 mummies vs 2 lobsters + 4 phantom warriors (node battle)
Result: 0 HP lost, lobsters raised as undead
4 mummies + 2 lobsters (thanks, node) vs 5 Focus Magic sprites, 1 war bears, 3 Draconian swordsmen (fortress battle)
Result: enemy wizard defeated, 7 enemies raised as undead
3 mummies vs 3 basilisks, 5 boars
Result: 0 HP lost, all enemies raised as undead
4 mummies + 3 basilisks vs 1 demon lord + 1 mummies
Result: 1 mummies lost, but I won lol
Verdict: hardcore snowball cheat code. Mummies can't win against absolutely everything, but the massive tidal wave of free, disposable ghouls in every battle sure does help. Ghouls look weak but a tide of 12 ghouls all firing away at a demon lord will still chip its health away -- I didn't find any rare units to fight but after that battle I'm even more confident that most things would be a pushover.
Then the undead that get raised help in the next battle. Didn't think I'd necessarily win the fortress battle or the demon lord battle, but they were actually cakewalks. Also the only spell I cast in any battle was Healing (since I hadn't researched anything else at that point), and I usually didn't even need that. If I were to really play it I'd add the Nodemaster retort, since the mummies are basically a lair / node clearing machine.
2 mummies vs 2 giant spiders + 3 awakened trees
Result: 0 HP lost, trees raised as undead
4 mummies vs 2 cockatrices + 2 earth elementals (node battle, no spells cast)
Result: a bit of damage on the mummies, all enemies raised as undead
2 mummies vs 4 phantom beast + 3 phantom warrior (node battle)
Result: all enemies killed but it took 2 turns; no problem, since the mummies are flying
4 mummies vs 5 giant spiders (node battle)
Result: 2 mummies lost, 2 spiders raised as undead... tough one, but only because the spiders have 11 resistance in a node and could prevent the mummies from summoning for a couple turns
4 mummies vs 2 lobsters + 4 phantom warriors (node battle)
Result: 0 HP lost, lobsters raised as undead
4 mummies + 2 lobsters (thanks, node) vs 5 Focus Magic sprites, 1 war bears, 3 Draconian swordsmen (fortress battle)
Result: enemy wizard defeated, 7 enemies raised as undead
3 mummies vs 3 basilisks, 5 boars
Result: 0 HP lost, all enemies raised as undead
4 mummies + 3 basilisks vs 1 demon lord + 1 mummies
Result: 1 mummies lost, but I won lol
Verdict: hardcore snowball cheat code. Mummies can't win against absolutely everything, but the massive tidal wave of free, disposable ghouls in every battle sure does help. Ghouls look weak but a tide of 12 ghouls all firing away at a demon lord will still chip its health away -- I didn't find any rare units to fight but after that battle I'm even more confident that most things would be a pushover.
Then the undead that get raised help in the next battle. Didn't think I'd necessarily win the fortress battle or the demon lord battle, but they were actually cakewalks. Also the only spell I cast in any battle was Healing (since I hadn't researched anything else at that point), and I usually didn't even need that. If I were to really play it I'd add the Nodemaster retort, since the mummies are basically a lair / node clearing machine.