Restore health:
Save the game when near a mushroom ring. Quit, then reload the saved game 
to restore your health. 

Stepping inside any of the mastery rings will restore you life. This is much faster 
than saving and restarting the game.

Rune locations: 

Light Rune: In Chapter 3, a witch and her sister will give you the rune and a spell. 
Fire Rune: In Chapter 4, Defeat the Beguiler and his clown to get the rune. 
Water Rune: In Chapter 8, reunite the lost brothers to get the rune. 
Dark Rune: In Chapter 10, reunite the two children with their mother to get the rune. 

Ice Ward:
That the Ice Ward is extremely powerful, especially when you are a Water Mace. 
This move works well on everything apart from blue monsters, especially on 
things that cannot move. If you are trapped by bars of any color 
(only when you are a Water Mace), hit the bars with Ice Ward and cast the 
spell forever for best effect (creates a shield of ice).