The Vesperal Gem

Once per turn, in your hero phase, before the bearer attempts to cast a spell from the Lore of the Deepwood, instead of making a casting roll for that spell, you can say that they will use the Vesperal Gem. If you do so, that spell is automatically cast (do not make a casting roll) and cannot be unbound. After the effect of that spell has been resolved, roll a dice. On a 1, the bearer suffers D3 mortal wounds.