Lancer in Ireland

"The three factors that affect the status of a Servant are land, recognition, and Master.
With respect to land and recognition, the closer one is to the land (cultural sphere) that was the stage of the legend of the Heroic Spirit and the more that spirit is known, the stronger he is.
The meaning of "strong" here is the Servant becoming closer to the strength, equipment of that of the legend. Through this blessing, the addition of another NP is also possible.
If Chu Chulainn had been summoned in his homeland Ireland, a castle, chariot, protection of sleeplessness, and the like would have been added probably. Also, if the magic energy of the Master is powerful, the Servant will become closer to his strength as in the legend."

Fate/complete material III: World material - Records of Heavens Feel - Servant System: Factors Affecting Servant Status, p.014