public List <UnitTower> supportSrcList = new List <UnitTower>(); //the support towers buffing this tower
public void SupportBuffTower(UnitTower tower)
{
if (!IsSupport())
{
Debug.Log("calling non support tower to buff?"); return;
}
supportTgtList.Add(tower);
tower.supportSrcList.Add(this);
Effect effect = GetEffectOnHit(); //.Clone();
effect.duration = Mathf.Infinity;
tower.ApplyEffect(effect);
}