I have a team that uses these exact colors:
The Dragon Soul***
Abyssal Banner. Dragon Soul leads into everything, everything leads into Dragon Soul. Very rarely do you get a board after the explosion where Dragon Soul can’t just be instantly refilled, be it from a single match, convert, or explode from one of the others, and that is if the amount of purples you got from your prior convert to fill him aren’t enough to just fill him up from the explosion and subsequent cascade. If you have a match 5 lined up for Shadow Dragon, it is basically a free action - a single match 5 and match 3 from his convert generates between 19 and 22 mana, often enough to top Dragon Soul and fill himself right back up to be used again after the next explode.