Wizards Per Acre

Wizards per Acre is often abbreviated as WPA. In its unmodified form it is also known as raw WPA.

Wizards per Acre = Total Number of Wizards / Total Acres

Magic Effectiveness causes an apparent change in WPA, without changing the actual value. This is known as mod WPA.

Modified WPA = Raw WPA * Channeling Science

Cast Failure

When casting Offensive Spells, the chance of a successful cast is proportional to the quotient of your WPA and the Opponent's WPA.

~ Chance for Success: (Your Mod WPA) / (Opponent's Mod WPA)

When casting Defensive Spells, the chance of a successful cast is proportional to your province's percent Guilds.

~ Chance for Success: Guilds / Acres

Spell Duration is proportional to your province's percent Guilds.

Spell Duration Mod: Guilds / Acres