The Kickstarter Limited Exclusive Mini-Expansion is contained in the box of the Deluxe edition for Kickstarter backers, but may also be available separately in the future. From the Kickstarter page,
Kickstarter Limited Exclusive - VERY limited quantity printed. Will never enter regular distribution channels but may become available via contests, conventions, and/or the BGG store.
It introduces 11 cards not found in the Base edition:
Giant Snake (Dire Enemy)
Basilisk (Dire Enemy)
Fire Elemental (Epic Foe)
Overlord (Epic Foe)
Baal's Bait (Artifact)
Gavel of Gamelyn (Artifact)
Necromancer (Hero)
Assassin (Hero)
Avenger (Legendary Hero #1)
Revenant (Legendary Hero #2)
Guardian (Legendary Hero #3)
- Tiny Epic Defenders: Kickstarter Mini-Expansion