Was sky hit by Orbit in the beginning of the next turn or at the end of last turn? In the latter case, she should be burning too.
sky was -technically- hit today, on Day 12, not Day 11. I just applied the damage early; as the weapon relics take precedence
before movement, but after epic/legendary tier relics, there was no way for sky to avoid getting hit by Orbit. However, because she is already in a fountain tile (used, but still a fountain tile), the burning effect can't be applied.
Does Burning take effect at the end of a turn, or elsewhen?
Always at the end of a turn, after all other damage is applied.