We know they're underwater with a minimal amount of cues, which is both reinforced by the limited use of color and the lily pad vines we see
Its in the worst deck and while most of the copies busted arent going in a deck, there arent many copies being busted since players arent excited and the deck isnt worth anything
As for Vivis second effect, you may rest Vivi to give one of the opponents Characters a -2,000 Power reduction, and you can give the Rush keyword to a Character that doesnt have the When Attacking effect
The Tron lands generate a massive mana advantage for players
It was even considered by some to be a bad Limited mechanic because relying too heavily on Dredge cards could quickly exhaust your 40 card deck so at best youd want just a couple Dredge cards
After all, you have pretty much every card in the game to choose from