public List <ManaColor> GetAvailableMana(ManaUsage usage, ConvokeAndDelveOptions convokeAndDelve)
{
var restricted = new HashSet <ManaUnit>();
var allocated = new List <ManaUnit>();
var units = _units
.Concat(GetAdditionalManaSources(convokeAndDelve))
.ToList();
foreach (var manaUnit in units)
{
if (IsAvailable(manaUnit, restricted, usage))
{
restricted.Add(manaUnit);
allocated.Add(manaUnit);
RestrictUsingDifferentSourcesFromSameCard(manaUnit, restricted, units);
}
}
return(allocated.Select(x => x.Color).ToList());
}
