When illusions of Dragon Knight get created during Elder Dragon Form, the illus will copy Elder Dragon Form as well. However, they currently copy it based on your spell's level as the illusions get created.

This means when you level EDF up after you already cast it, illus created of you will use the new level, instead of the level you had it on as you cast it. This makes it possible to get red dragon illusions while being a green dragon, and blue dragon illusions while being a red dragon (or in very rare cases, blue dragon illusions while being a green dragon)

Repro:
1. Cast Elder Dragon Form on level 1
2. Level up Elder Dragon Form to 2 or 3
3. Create illusions of Dragon Knight (e.g. Manta Style)

Result: Even though you are a green dragon, your illus will be red/blue dragons, because they check the current level of your spell.

Expected: The illus should copy your current active level. If you are a green dragon, your illus should ge green dragons as well, regardless of your ult's current level.