Custom Undead can get drunk when talking to Ifan if you accept the drink you gave to Ifan (it should just fall right through). Sebille acts like my undead character has flesh while going on about her speach about how all flesh is weak.
Healing tears will hurt your undead party members and allies, all the electricity spells keep hurting and shocking the caster and their team mates even though they are nowhere near them. It makes using the air magic tree incredibly frustrating.
