Having started out as a scrum-half, Waters showed he has more than adapted to the rigours of openside play against as experienced an operator as Martyn Williams.
His turnovers and carrying played a major part in the Dragons' 18-14 victory - only their second win over the Blues in their last 11 encounters - and now Waters is eager for more.
"It was my very first regional derby and it was absolutely savage but I am glad to be coming away with the win, it was a good result, and a well-earned battle," he said.
"The situation seems to have been the same all season with us just falling at the last hurdle but we pulled it off tonight.
"It was a great confidence boost and hopefully the team morale will build and we will take it from here."
The Dragons' other hero was South African winger Tonderai Chavhanga whose sensational late try earned Darren Edwards' side the bragging rights.
Renowned as one of the fastest wings in World Rugby, Chavhanga collected Phil Price's pass before kicking ahead to turn on the afterburners in a one-sided footrace.
"In terms of the try, there was only one man in front of me so I decided to chip it over and fortunately I got a good bounce and managed to score the try," he said.
"There wasn't anybody immediately in front of me so I did think I had a chance to score.
"When I saw the full-back come in and I realised there was no-one behind him I thought I would chip it over and it paid off."
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