int ac = 20;
AttackRoll basicYakAttack = factory.getSimpleAttackRoll(5, 3, 6, 3);
AttackRoll advantageYakAttack = factory.getSimpleAttackRoll(5, 3, 6, 3, Advantage.ADVANTAGE);
RollBuilder basicYakRoll = factory.getDamageRollVsAC("Yak Attack", basicYakAttack, ac);
RollBuilder advantageYakRoll = factory.getDamageRollVsAC("Yak Attack", advantageYakAttack, ac);
RollBuilder trample = factory.getD20Roll(5).filterAndFlatten(13, FilterType.LESS_THAN);
basicYakRoll = factory.getCompositeTernaryRoll(
"Yak Attack Trample",