Coalblack

Coalblack was Prince Rilian's horse during his stay in Underland. During the Prince's time in the North, he would occassionally ride Coalblack with the Lady of the Green Kirtle on her horse, Snowflake, in Overland around Ettinsmoor and Harfang always clad in black armour which is where he got the title "The Black Knight". He was also ridden by the Prince during the Fall of Underland with Jill Pole, while Eustace and Puddleglum rode Snowflake.