Legendary cards require no specific orbs, are very power-expensive and you can only have one unit of its kind in play at a time (including allies and enemies). There are a total of 23 Legendary cards in the game. None of these are Tier One cards.
Tier Two 
Edit
Buildings Edit
| Dark Crystal | Earth Crystal | Flame Crystal | Ice Crystal |
Creatures Edit
| Easter Egg Promo | Moon | Rogan Kayle | Rogan Kayle Promo | Viridya | Viridya Promo |
Tier Three Edit
Buildings Edit
| Amii Monument | The Incredible Mo |
Creatures Edit
| Brannoc | Lord Cyrian Promo | Mo | Mo Promo | QueekQueek | Santa Claus Promo |
Spells Edit
| Curse Orb | Curse Well |
Tier Four Edit
Creatures Edit
| Jorne | Ravenheart | Ravenheart Promo |
