Libra

Unit #078

HP	PWR	CP	Speed	Range	Tier
15 (+9)	2	4 (+3)	Normal	Any	B

Abilities

Zero Sum — 0 AP

Zero Sum: 0 AP - a, 1x: You and your opponent each Target Any Demon during target declaration, with your opponent declaring their target first. Fatally Wound the targeted Demons. e: Ignore their CP for the purposes of scoring.

Engine Implementation

def _libra_zero_sum(
    state: GameState, demon: DemonInstance, targets, choices, rng
) -> GameState:
    """#078 Libra — Zero Sum
    0 AP, (exhaust), 1x: You and your opponent each Target Any Demon during target
    declaration, with your opponent declaring their target first. Fatally Wound the
    targeted Demons. Status: Ignore their CP for the purposes of scoring.

    CRITICAL: "Ignore their CP" means the fatally wounded demons do NOT contribute
    CP when they die. We implement this by fatally wounding both targets and
    applying "cp_override_zero" status on both (overrides get_effective_cp to 0).

    Complex targeting: targets[0] = Libra owner's target, targets[1] = opponent's
    target (both passed by the caller based on each player's declaration).

    Targets: [owner_target, opponent_target]
    """
    # Fatally wound both targets and mark their CP as ignored
    for target in targets:
        if not target.fatally_wounded:
            new_state_tmp = copy.deepcopy(state)
            t_in_new = next(
                (d for d in new_state_tmp.demons if d.instance_id == target.instance_id),
                None,
            )
            if t_in_new is not None:
                t_in_new.fatally_wounded = True
                # Apply cp_override_zero so the deaths don't score CP (confusion #11)
                new_state_tmp = apply_status(
                    new_state_tmp, demon, t_in_new, "cp_override_zero", 1
                )
            state = new_state_tmp
        else:
            # Already fatally wounded — still apply cp_override_zero
            t_in_existing = next(
                (d for d in state.demons if d.instance_id == target.instance_id), None
            )
            if t_in_existing is not None:
                state = apply_status(
                    state, demon, t_in_existing, "cp_override_zero", 1
                )
    return state

register_ability("078", 0, _libra_zero_sum)