The Diin is a wizard-class hero from the Wrath of the Elements set.
Diin Illusionist (Level 1)
The Illusionist has a Magical Attack +2.
Diin Beguiler (Level 2)
The Beguiler has a Magical Attack +2, and allows one Militia in your hand to duplicate all the abilities (including Dungeon: abilities and traits) of another hero in your hand.
Diin Enchanter (Level 3)
The Enchanter has a Magical Attack +2. As a Dungeon: ability, it allows you to discard one Militia, to draw the top hero from any stack. At the end of the Battle, that hero is destroyed. The Enchanter is worth 2 Victory Points.
Rulings and Errata
Currently, this card does not work with Regulars.