D&D AnyDice Two-Fanged Strike

gistfile1.txt

MISS: 0
HIT: 1
CRITICALHIT: 2

function: attack ROLL:n vs DEFENSE:n {
 if ROLL = 1 { result: MISS }
 if ROLL = 20 {
  if ROLL + ATTACK >= DEFENSE { result: CRITICALHIT }
  result: HIT
 }
 if ROLL + ATTACK >= DEFENSE { result: HIT }
 result: MISS
}

function: damage for ATTACKS:s {
 D: 0
 loop A over {1..#ATTACKS} {
  if A@ATTACKS = CRITICALHIT { D: D + CRITICAL }
  else if A@ATTACKS = HIT { D: D + DAMAGE }
 }
 result: D + [extra damage for ATTACKS]
}

function: extra damage for ATTACKS:s{
 if [ATTACKS contains CRITICALHIT] { D: [maximum of QUARRY] }
 else if [ATTACKS contains HIT] { D: QUARRY }
 else { D: 0 }
 if ![ATTACKS contains MISS] {
  result: D + 4
 }
 result: D
}

function: twofanged strike {
 result: [damage for 2d[attack d20 vs DEFENSE]]
}

DEFENSE: d{12..22}
QUARRY: d6
ATTACK  : 6 + 2
DAMAGE  : d12 + 6
CRITICAL: 18
output [twofanged strike] named "Greatbow"