New hero Nyra:
Survive endgame level 3 with at least 120 Elven Archers, or on Insane difficulty, to unlock Nyra.
Nyra always attacks the unit furthest away.
You gain 15 gold every time you upgrade Nyra.
Nyra keeps gaining more interest when above 500 gold, but it has diminishing returns.
The first time Nyra dies all enemies also die.
Everything in the shop costs 20 gold more and you cannot upgrade units special abilities.