Also, I can just give cards like Deafening Silence around the table to opponents who dont have a sacrifice package to draw cards later
Escape Protocol will be very helpful with Niv-Mizzet Reborn on the battlefield, allowing me to flicker him and get another 10-card flop for just one mana when I cycle another card
Valley Floodcaller allows you to give Flash to all noncreature spells, allowing you a bit more freedom with when you play Enchantment, Sorcery, and other cards
As proof of concept, Aaron turned in a card with his mechanic proposal
The most used modes chosen in Commander are likely to be drawing two cards and dealing five damage to target creature, though the artifact destruction is also a nifty option if one of your opponents has a particularly annoying trinket on the board
There will be some times when you need to cast your Nullify on turn two on absolutely anything your opponent plays, just to avoid falling behind