Warlock's Wrath

Warlock 1+. When the warlock is successfully targeted by a spell he did not cast himself, he may sacrifice a Risk Die by rolling it. If the result isn't '1', choose to divide {Risk Die Result} any way you wish between damage done to the offending caster and a penalty applied to their next roll within the current encounter. For Warlock 3+, add your Warlock level to the Risk Die Result before assigning damage and a penalty. After applying this damage and this die roll penalty, steal 10% of the target's remaining hit points (no saving throw) and add them to your own.