Forest Goblin Shamans may re-roll one dice when casting spells. However, any time they Miscast, they will also count as having failed a Stupidity test (if they survive).
Source: Warhammer Armies Project: Unofficial 9th Edition (v2.2)
Forest Goblin Shamans may re-roll one dice when casting spells. However, any time they Miscast, they will also count as having failed a Stupidity test (if they survive).