Pretty much a budget stalling until win control deck. I included black in this due to sin collector and doom blade.
Explanations:
Dissolve: A cancel that let's you scry. Overall great counter.
Judge's Familiar: A one drop 1/1 with flying that can counter spells. Great card for early game stalling.
Azorius Charm: Allows you to return blocking or attack creatures to the top of owner's library. Awesome for messing with your opponent's next draw step and if the card was big their entire next turn. Can also be used for lifelinking your Aetherling or massive Pack Rat.
Detention Sphere: Great for dealing with pesky cards that your opponent's deck may rely upon (i.e. Assemble the Legion or Gods)
Render Silent: Cancel and Silence made a baby and this was it. Good card overall for stalling your opponent.
Cancel: Just needed a bit more counterability in this deck. I would just put in 2 more Render Silents but Cancel is slightly less mana specific and that's what is needed in a tri-color deck.
Aetherling: Win Condition. Added with lifelink from an Azorius Charm it can also keep you on your feet just in case.
Pack Rat: A great reason to splash black in any deck. Pack Rat works beautifully for creating chump blockers and that's what it should be used for. Originally I was going to use red over black and use Assemble the Legion for creating blockers but it was too slow.
Supreme Verdict: In case you're opponent's side of the board is looking scarier than yours.
Silence: Overall great stalling card that gets you painlessly to your next turn.
Doom Blade: Removal in case your opponent gets out any cannons.
Sin Collector: Budget Thoughtseize. Always nice to know what your opponent has in their hand and to get rid of anything that might cause issues.
Sideboard:
Tidebinder Mage: Good for controlling Red and Green
Dark Betrayal: Removal in case your opponent is running black.
ratchet bombs: For dealing with tokens that get out of control.
Please let me know how you like the deck in the comments and if you have any recommendations on how to make it better. Keep in mind this deck was made on a budget and can be made better easily if you can put a bit more money into it.