I just encountered the darnedest thing playing as Delirium's Seth on a Hero of the Hour map, my daily movement was continuously full, allowing me to storm the entire map in essentially a single turn. Additionally, the mana for the first spell cast was not deducted from my mana pool beyond the amount provided by the mana buffer skill, allowing me to use my mana buffer for far more expensive spells, as only the second and beyond spell would consume mana.

If there is a way to submit the save file to the devs for inspection I would love to hear about it