Units trained at Tree of Life
The Tree of Life is where Wisps are created and acts as a Town Hall of sorts for the Night Elf Sentinels, though wisps do not need to return here to drop off gold and lumber.
Units trained at Ancient of War
The Ancient of War is where Archers, Huntresses, and Glaive Throwers are created. The Sentinel, Improved Bows, Marksmanship, Upgrade Moon Glaive, and Vorpal Blades abilities are researched here.
Units trained at Ancient of Lore
Keeper of the ground based spellcasters. Trains Druids of the Claw, Dryads, and Mountain Giants. Also contains the upgrades for Druids of the Claw, Enchanted Bears, Abolish Magic, Hardened Skin, and Resistant Skin.
Units trained at Ancient of Wind
The Ancient of Wind is where Hippogryphs and Druids of the Talon are recruited. The Druid of the Talon's spells, Storm Crow Form and Cyclone, are researched here, as is Hippogryph Taming which enables archers to mount and dismount the Hippogryph and attack from the air.
Units trained at Chimaera Roost
The Chimaera Roost is where Chimaeras are trained. It is also where the Chimaera's Corrosive Breath ability is researched.
Summonable units of the Night Elves
The night elf heroes can summon a variety of units ranging from attacking units to units good for scouting. the Keeper can summon treants from trees the priestess can summon a owl that can scout and the Warden can summon an Avatar of Vengeance that summons invulnerable Spirits of Vengeance that last for a period of time.