No, that was a left over from when immolate foe did damage too. I will remove it for now. I may still add damage back to immolate foe at some point.A note on the Wyrm's mythic actions.
1) Imolate foe is normally 1 LA, but once you go mythic its 3. Is that intended?
2) You make spell-casting part of the mythic LAs, but since you made a specific note that the spells are flavor and not really a party of the Dragon's core CR, it seems strange to add them in as LA actions.
Well, when the spells are not available as legendary actions they would generally be a waste compared to a normal attack routine (CR wise). That is why they don't figure - using them doesn't change the CR. However, since the mythic action is less than the full HP, I have more room to deal damage and magic is now an option for a legendary action. But to be honest I haven't looked at these mythic actions since we made all of these changes and I need to review them too.
I could remove the note if that feels better.