Check out our list of the best Yu-Gi-Oh spell cards
Anvil of Bogardan Just what you need to make Fevered Visions work by limiting opponents to one discard a turn
The rest of the ratios look good, though I would prefer another board wipe or two: board wipes are good because your early turns are spent ramping, not developing a board presence, so a board wipe is a great catchup mechanic before you start dropping your haymakers
As you should know by now, the targets of spells and abilities pass the legality check twice: first time when casting/activating/placing them onto the stack, and another time upon resolution
How about trying your luck or planning a video project
Whenever you discard a card, target creature an opponent controls gets -X/-0 until your next turn, where X is the number of different mana values among cards in your graveyard