// Hydra.Team.Mission delegate
public delegate bool Mission(Monster target);

// this is inside a foreach monster type thing, or something
try
{
    if(!monster.Immunities.Contains(Immunity.Physical))
        Hydra.Attack(monster);
    else
        throw new UnableToKill(monster);
} 
catch(UnableToKill unable) 
{
    Hydra.Team.Mission mission = 
        delegate(Monster target)
        {
            //Travel to A3
            //Go to Trav
            //Go to monster
            //Attack monster
        }

    Hydra.Team.GlobalQueue.Add(unable)
}