Tian Shi

Tian Shi may re-roll one Power dice on each casting attempt.

A Wizard with Loremaster knows all the available spells from their chosen lore (limited by their Wizard level as normal). The lore in question is normally given in brackets as part of Loremaster. If a model knows spells from multiple Lores, then Loremaster only applies to one Lore of your choice.