While sticking to mono-white does limit your options, having access to a cheap Donate on tap is a big deal
This allows you to focus on the player who has the least blockers while also dealing damage to the player you decide is your biggest threat
I had the various Orbs of Dragonkind in the deck, but eventually cut them for more Dragons, except for Jade Orb, since it gives hexproof to whatever Dragon you cast with its mana, helping to ensure its survival until your next turn
Cards are valued according to their TCGPlayer Market Price, which you might pay for a near-mint copy of the cards below
As reported by MTGStocks, there's already been a key ruling on that ability to clarify that, for rules purposes, Mister Negative's 'swapping' process means that players actually gain or lose life (as necessary) to get to their new total
In a pinch, they can be sacrificed to gain life if your life total is getting too low