killed with sword but the spells are extremely important
tips/important things:
1. the most important thing is: heal spell
i have no idea whatsover how to win the game without it
if u have it, u can just kill a monster, heal youself to max health (pass time with z so u can cast as many times as u want)
2. a sword is extremely useful.
3. a good trick is raise dead + protection. u can literally double their health (and again, same trick as heal. z so u can protect all of them)
talking about protection, it is either bugged or the description is wrong. the description says the shield is a fixed amount (7) but every time u cast it, the shield is different (similar to lightning)
the problem with summons is u can't control them
4. paralisys spell was very useful up to a certain depth. but for some reason, on late game, the monsters were kinda resistant to it (bug?)
mine was lvl 3 (should paralyze for 4 turns) but some mosnters were paralyzed for only 1 turn (they were not the mosnter's that are immune to it like undead and such. i'm talking about dragons and trolls)
5. teleport spell mostly for teleporting away the enemy. sometimes, in extreme urgencies, teleport yourself. but u need luck for that
6. patiance. go up a few depths to get stuff u left behind (like potions and forges). before i went to depth 14 i went all the way back to 1 to get everything
7. save the powerful consumables (dynamite) for depths 13 and 14.
i forgot the name of the blue potion... against magic creatures... it's very difficult to defeat lich without it
8. explore all depths!!! u NEED to find the good stuff to be able to beat deaths 13 and 14
9. don't let your allies die! once again, heal spell is very useful
10. i'm pretty sure ranged spells would be awsome, but i was unlucky and didn't get any