Just pack the Heroic Intervention, Teferi's Protection, and similar protection spells to keep your board alive
In a deck where the goal is to power up Niv-Mizzet Reborn, rather than playing four of the best removal spell in the format, it's actually more beneficial to play some (slightly) weaker removal spells in different colors to maximize the power of Niv's enters-the-battlefield ability
Ungraded & graded values for all Pokemon DRI Pokemon Cards
Then when you can deal that combat damage, all damage dealt to them for a round of turns is...doubled
Its a fantastic option for Ball Lightning cards, but you have plenty of other options like Slumbering Trudge and Gadrak, the Crown-Scourge for large, cheap creatures with downsides that dont matter when you plan to sacrifice them anyway
With just a handful of creatures on the battlefield, Zada makes Expedite look like a better version of Ancestral Recall