Posts from How do I obtain the resurrection spell from demons?

Once, while playing as the Inferno faction, I noticed that I somehow acquired the resurrection magic, which is exactly the same as the Necromancer's. But no matter how hard I tried later, I couldn't get it again. Can you tell me what I need to do to make it appear in the spellbook, and how can I improve it?

build a guild of mages. maybe you'll get lucky. but you can't upgrade it.

Well, it becomes stronger if you develop the Summoning magic skill. And the fact of obtaining the spell is random: it may or may not appear. The Raise Dead spell is given at the second tier of the guild.

Look for altars, level up a sharp mind or a scholar; there are many ways to do it.

obtain: guild level 2 (Necropolis, Stronghold, and Castle have the highest chance)
improve: Lord of Life (Summoning), increase Spell Lore (and Knowledge), Metamagic and Secret Knowledge (Sorcery) may be useful, as well as Magic Affinity (Education)

additional information:
Raise Dead
resurrects X creatures for the duration of the battle (undead are resurrected permanently)
each use reduces the maximum hit points of the target unit by 20% (down to 1 HP)
restorative power = summoning skill + spell lore multiplied by X hit points
(none) 120+15*spell lore
(basic) 160+20*spell lore
(advanced) 200+25*spell lore
(expert) 240+30*spell lore
Lord of Life spell lore +4

Added 1 minute ago
requires 9 mana

Added 13 minutes ago
I'll add something else...
the main magic of Inferno (always appears) is Chaos and Darkness
the third slot is filled with a Light or Summoning spell
summoning level 2: Raise Dead, Crystal of Secrets, or Summon Hornets
light level 2: Stone Skin, Regeneration, or Dispel

result: chance of appearance 1/6