Fantasy Frankenwolf Troll formula

NumberAbilityDice:=1; \ Change to alter the number of ability dice
NumberProficiencyDice:=0; \ Change to alter the number of proficiency dice
Target := 5; \Change to set the difficulty of the target number

x := NumberAbilityDice d8;
abilitysuccess:= count Target <= x;
abilitycrit:= count (x keep 8); \Doubles the dice that roll 8s
abilityfail:= count 1=x; \Subtracts dice that roll 1s
abilityroll := abilitysuccess+abilitycrit-abilityfail;

y := NumberProficiencyDice d12;
proficiencysuccess:= count Target <= y;
proficiencycrit:= count (y keep 12); \Doubles the dice that roll 12s
proficiencyfail:= count 1=y; \Subtracts dice that roll 1
proficiencyroll := proficiencysuccess+proficiencycrit-proficiencyfail;

Skillcheck := abilityroll + proficiencyroll;
Skillcheck