Final Mission

The rules for MoV are explained in the info tab - MoV afflicts the target and friendlies in a 5 tile radius. The YE casts it every turn, on a different operative when possible (the YE can only cast it on operatives that have crossed the Gate).

You don’t need medkits or Technicians, and you don’t need the YE to open. What you want is to get to the YE as fast as possible with your whole team, but keeping some distance between them so that they don’t get the damage from two or more MoVs at the same time. There are always 2 openings from which you can attack YE, that’s why you want to get up close. Once there you can finish it in 3 turns if you got enough firepower (like a few Heavies with Deceptors and Rage Burst).

It’s not physical, and it doesn’t attack whole team. It places a ‘mark’ on one soldier every turn. That soldier and any friendly within 5 tiles will suffer 40 damage per ‘mark’ (sometimes there is a dropoff ant it falls to 20). So if you have 3 soldiers with the mark within 5 tiles of each other they will suffer up to 120 damage per turn. If the YE can’t place the MoV on a different soldier (for example, because only a few soldiers cross the gate), it will place it on the same guy and the marks will stack. So if the same guy has 3 marks, he will receive 120 damage each turn.

Defeating the YE is easy (last time I finished it on Legend without using a single medkit) provided you move on it fast, keep the 5 tile distance and when you get there have the firepower to deal a lot of damage. You want to go for the eyes (because they cause massive loss of HPs), and the point of the tentacles is to protect the eyes.