But I think it can be extremely good in a wizard typal deck
You can force them to use their mana in their turn
By sacrificing your own board with it on the stack, and by pre-emptying your opponents yards with anything from a Soul-Guide Lantern to an Author of Shadows, you can simultaneously wipe the board, get a load of EtBs, and slingshot into the lead
Creatures either dealt damage and received combat in damage, or didn't deal or receive damage - they couldn't deal damage and then be bounced afterwards
You can tap it down on your opponent's upkeep to restrict access to that color of mana if they only have one land of a certain color
There definitely needs to be at least one more pass on it, but these cards are good starts for what I would want it to look like,