As of latest version of Elona+, it is part of the multiplier for melee damage.
It is the dominant attribute for most healing spells. This means higher Will will cause your spells to heal for more dice worth of HPs. Because of this, Will is the primary attribute of "Cleric-type" characters.
Will is trainable through use of skills or special actions that depend upon Will, but it may be easier to train through food. None of Will's skills are spammable without some setup. Vegetables, especially the common healthy leaf and edible wild plant, train Will, especially when Cooking is employed.
Riding is spammable for training Will with some setup time, as launching ranged attacks with either a weapon too weak to kill or upon dividing creatures like bubbles from behind an obstacle.
Magic Capacity is spammable for those with a high enough Magic Capacity already to not be in terrible danger from purposefully driving into negative MP scores, as well, but even then, you will be consuming large amounts of spell stock trying.
An increase in Will triggers the message "<character>'s will hardens."
A decrease in Will triggers the message "<character>'s will softens."
Skills that train WillEdit
In Elona+, Traveling is not a Will-related skill. Eye of Mind is a Will-related skill, however.
Corpses that train WillEdit
|Strength||Tactics · Two Hand · Weight Lifting · Long Sword · Axe · Martial Arts · Scythe|
|Constitution||Healing · Mining · Shield · Heavy Armor · Medium Armor · Carpentry · Blunt · Polearm · Stave|
|Dexterity||Lock Picking · Dual Wield · Light Armor · Evasion · Tailoring · Pickpocket · Jeweler · Disarm Trap · Short Sword · Bow · Crossbow · Throwing|
|Perception||Stealth · Sense Quality · Detection · Fishing · Eye of Mind · Greater Evasion · Marksman · Firearm|
|Learning||Literacy · Memorization · Alchemy · Anatomy · Gardening · Cooking · Gene Engineer|
|Will||Magic Capacity · Faith · Traveling · Riding · Eye of Mind (Elona+)|
|Magic||Meditation · Casting · Magic Device · Control Magic|
|Charisma||Negotiation · Investing · Performer|
|Speed||Swimming · Traveling (Elona+)|