Which powerful grey had 34 victories that included the 1989 Cheltenham Gold Cup & four King George VI Chases?

The correct answer was DESERT ORCHID.

Desert Orchid, known as Dessie, was an English, grey racehorse who achieved an iconic status in National Hunt racing.  Adored by enthusiasts and won in total 34 races, including seven at Kempton, where four victories in the King George VI Steeple Chase underlined his immense talent.