public override void Enter()
        {
            _targetSystem    = InputSystem.Game.GetSystem <TargetSystem>();
            _targetAttribute = InputSystem.ActiveCard.Card.GetAttribute <ManualTarget>();

            _targets = new List <CardView>();
            _targetAttribute.Selected = new List <Card>();

            var candidates = _targetSystem.GetTargetCandidates(InputSystem.ActiveCard.Card, _targetAttribute.Allowed);

            _candidateViews = InputSystem.GameView.FindCardViews(candidates);

            InputSystem.ActiveCard.Highlight(_targetAttribute.RequiredAmount == 0 ? Colors.HasTargets : Colors.NeedsTargets);
            _candidateViews.Highlight(Colors.IsTargetCandidate);

            if (_targetAttribute.Allowed.Zones.HasZone(Zones.Deck | Zones.Discard | Zones.Hand))
            {
                // NOTE: We only expect one of the above zones to be targetable at once, bad assumption?
                var player        = _candidateViews.Select(c => c.Card.Owner).Distinct().Single();
                var zoneToPreview = _candidateViews.Select(c => c.Card.Zone).Distinct().Single();

                if (player.Index != MatchData.LOCAL_PLAYER_INDEX || zoneToPreview != Zones.Hand)
                {
                    var zoneView = InputSystem.GameView.FindZoneView(player, zoneToPreview);
                    zoneView.GetPreviewSequence(sortOrder: PreviewSortOrder.ByType);
                    _zoneInPreview = zoneView;
                }
            }
        }