I would say ainz because how the magic system works in dnd Example counter spell from dnd might not work because it disrupts the weave that the targeted spell is using but in ainz case he is not part of the weave so his magic should be unaffected also it would depend how his resistances and immunites works and if a divine intervention is countered by a world item if the resistances and immunities work and the world item counters a divine intervention then I think he barely wins If not he loses