If we can keep Teferi off the board, Didn't Say Please and Thought Collapse allow us to play a weird control-mill game, where we try to stick a copy or two of Drowned Secrets, always leave up a counterspell for whatever threat our opponent might have (while hopefully using the rest of our mana to cast cheap mill cards during our turn), and slowly mill away our opponent's library as we counter their threats
The showcase scrolls version is over $15
Rhox Faithmender is a four mana White 1/5 with lifelink, which is okay, but not great
That difficulty only becomes a greater burden as you add more colors, but by using lands with basic land types, you can mitigate this problem by making use of helpers like Polluted Delta, Skyshroud Claim, and Knight of the White Orchid to find them and put them onto the battlefield quickly
Whipflare: A great way to clear the board of a bunch of weenies.