Set 3 contains 14 Maps. 10 of the 14 are for getting new Classes, which, by the looks of it, appear to be the first time we'll be seeing 4th-Tier Classes.
Note: We don't have any stats for these, just the sprites and names.
- Lance Knight:
The Cavalier's "Over-Class" as the game calls it.
- Shielded Giant:
The Soldier's Over-Class
- Black Crane:
The Pegasus Knight's Over-Class. Is that a Wyvern though? Echoes currently doesn't have Wyvern Riders. Heck, Wyverns don't even exist in Valentia. They do, but only after Valentia becomes Valm 2000 years later.
- Shadowy Maiden:
The Mage's Over-Class, if the Mage is female.
- Virtuous Enchantress:
The Cleric's Over-Class
- Fearsome Warlord:
The Mercenary's Over-Class
- War Elephant:
The Archer's Over-Class. Yo, if we get to ride elephants in this game, Echoes is automatically the best Fire Emblem.
- Scholarly Sage:
The Mage's Over-Class, if the Mage is male.
- Noble Queen:
Celica's exclusive Over-Class
- Grand Conqueror:
Alm's exclusive Over-Class.
Alm. Conqueror (not really but that Class name is). You know who else was a Conqueror who was of Valentian/Valmese origin? Walhart. It looks like those theories of Walhart being Alm's descendant may be true after all.
Oh btw, in the case of Alm and Celica, their Over-Classes would be 3rd-Tier, as Alm and Celica only promote once.
In addition to those maps (btw, those 10 maps are called "Altar of the *insert Over-Class here*), there are four new prolouge maps that focus on the Deliverance. The first one, Battle of Zofia Port, seems to focus on a playable Fernand. The second one, South Fort Rescue Mission will focus on Lukas. The third, Escaping the Underground Ruins, will focus on Clair, while the last one, Defense of Zofia Castle, will focus on Clive.