The South African, who in six previous appearances on the course has never once finished outside the top five, is clearly in the mood to maintain that superb record.
Although he struggled to get the putts to drop for two-thirds of his round, the tide turned remarkably when he reached the final six holes.
He reeled off four birdies and a final hole eagle in that stunning stretch of golf to shoot a seven-under-par total of 65.
“I've had a lot of joy in this event in the past,” he said after the round, with some understatement considering he is chasing a third title this week.
“I always feel good when I arrive here,” he continued, “and the course suits me.
You've got to stick to your game plan and I executed mine very well today.
To go into the second round with a two-shot lead is way beyond my expectations.”
He was particularly proud of the way he played the final three holes.
“I had the right number on the 16th and managed to stick it close than on the 17th
I made a great putt.
“On the last I hit my best approach of the day to about eight feet but I got a bit lucky with the putt.
I got away with one there, but I had no luck on the front nine so it probably evened itself out.”
Three years ago Frost opened with a 64 before adding weekend scores of 67 and 74 to complete a wire-to-wire victory so he won't be afraid of the pressure or difficulty of an early lead, but there are plenty of players lined up to mount a challenge over the next 36 holes.
Playing in the final group of the day both Colin Montgomerie and Paul Wesselingh birdied the
par-five 18th hole to finish 4- and 3-under-par respectively.
Englishman Wesselingh, like Frost, is chasing a third win on the course, but Montgomerie is still seeking his first win at the Legend Golf course and he has never made such a positive start, indeed it is the first time he has broken 70 in round one, boding well for the weekend.
“I finished the round very strongly,” the Scotsman said.
“I made a silly mistake on the 12th, which cost me a bogey, but I hung in there and played some very nice stuff towards the end. I'm fairly happy with the start, but plenty of room for improvement over the next few days.”
England's Paul Eales set the early target with a bogey-free round of 67.
By the end of the play it was good enough for sole possession of second place but he was not in the clubhouse to find out.
“It was hot and sweaty out there,” he had laughed after his round,
“so I'm off to the beach – there's a sun-lounger with my name all over it!”
Argentina's Luis Carbonetti and South Africa's Chris Williams are tied third with Montgomerie on 4-under-par.
Four players sit alongside Wesselingh on 3-under, including England's
Paul Broadhurst, whose 69 gives him a three-shot advantage over his main rival for the
Rookie of the Year title Lianwei Zhang of China
“It's a tough course,” said newcomer Broadhurst.
“It looks beautiful, but it can bite if you miss the fairway by even one or two yards. I'm quite pleased with where I stand. I know the situation in the Rookie of the Year race, but the way I'm looking at it is that I want to win the
MCB Tour Championship.”
Round two starts at 8.30 today
The final group of Frost and Eales tees off at 12.50