Start with a problem: Eldrazi

Thought-Knot Seer is too good vs combo and demands your deck run tons of removal for it. Ideally instant speed removal. Also your deck can't be synergistic because Thought-Knot Seer takes synergistic cards away

Reality Smasher is too good vs removal.

Matter Reshaper is too good vs early game decks. Is only weak to some removal and creatures that beat it in combat.

-Other Eldrazi are color dependent and need to be dealt with on a case by case basis. Also Eldrazi Mimic usually isn't that oppressive as it's almost always going to be a 1 for 1.

White has the best removal for large eldrazi since they don't target Reality Smasher till they've entered the battlefield.

The other option is blue counterspells but I tried building a deck with counterspells and didn't like it.

Constraints: The deck must be cheap

The deck must survive rotation

Since the khans trilands are rotating out of Standard you need a dual colored deck unless SOI provides trilands.

New problem:

Monowhite can't card draw.

Then to start the deck I have to pick a card I want to play 4 of: [Knight of the white Orchid]. Which makes my mana base very white heavy which means I can only splash for a second color. And with 4 Knights I have to always pick to be on the draw.

Either go in black for Read the Bones or red for Frontier Siege. Frontier Siege rotates soon.

Elemental Bond in G also works

Ojutai's Command works too

For the sake of time I'll choose read the bones.