Nintendo released some details on what the Fell Xenologue DLC will be like in Fire Emblem Engage. There will be several restrictions on your army and play style, which make maps more challenging. As a reminder, you’ll be able to use Lady Nel and Nil in this DLC. However, if they (and Alear) die, then it’ll be an instant game over.
For starters, your units will always return at the end of the a Fell Xenologue chapter even if they die. It doesn’t matter if you’re playing on Casual or Classic. There is a restriction on your units, though. Fell Xenologue units will have a set level and class, as well as a starting inventory. This essentially means that you are unable to use your own characters, which might force you to have to use new strategies.
Lady Nel and Nil will be guest units every single map. Nintendo previously posted information on how you can use them in combat. Lady Nel uses lances and Dragonstones, with the latter weapon allowing her to transform into a Fell Dragon. This makes her a formidable attacker. Nil, on the other hand, is more of a support character. Like Nel, he is a Fell Dragon, but he is unable to transform.
Fire Emblem Engage is available on the Nintendo Switch. The Fell Xenologue DLC for Fire Emblem Engage will come out as Wave 4 of the DLC Expansion Pass on April 5, 2023.
Related: Best Emblems for Each Character in Fire Emblem Engage on Pro Game Guides