So I have been pondering/discussing the prospect of splashing black to UW Approach since Ixalan launched, but wasn;t sure of myself or where to start, but once I saw Esper Approach take 1st at GP Atlanta and 2nd at a Hannover PPTQ, I knew it was a step in the right direction.

The addition of Fatal push to answer one of the few problems Approach faces vs Energy decks (Servant and Cub, or Brawler) as well as the ability to sideboard duress to make sure you're second approach is clear, as well as hitting early LL, etc.

The options to add Scarab god and possibly Gonti or Vraska's contempt (though it's harder to play on curve than cast out, but can be targeted by T.Gearhulk.) are huge as well. I was running 2x hostage takers but feel like they just don;t do anything if you aren't putting any pressure on you're opponent so they got cut.

The deck is mainly counter-removal-cantrips. MB win-con; 4x approach 1x G.Hulk. Sideboard game 2 (sometimes I don't change the win-con in game 2 if game 1 went well enough and I know I'm not up against a counter heavy deck.

I run 1x Pull for a hand refill, and 1x confiscation coup as a use for energy aside from Hub. 4x Glimmer for energy as well. (I only run 3 Aether Hub, because it isn't that essential, and drawing into too many at once can really screw you)

I only have 2x Fatal push mainboard because I only run 2 evolving wilds, and since they are my only real way to trigger fatal push's revolt it quickly becomes useless lategame in many matchups. I keep 2x Fatal push and 2x unsummon (for early and late game stall) and keep 2x fatal push in the side, just in case.

Sideboard; I have a few creatures that all add a ton of utility, while also helping your board-state.

Gonti answers hydra and tyrant, and steals you a card. 2x gearhulk - Gives you a more agressive win-con. Scarab God gives you a large body and the ability to steal opponents GY creatures, and scry with passive damage.

The Negates are for Control Matchups mainly. Sometimes i side one in vs Temur or 4c energy.

Jace's defeat is a great answer to scarab god and any other blue spell, as a backup negate or scatter.

Spell Pierce is self- explanatory. Helps to get those spells out against sideboard or control.

Fatal push is here for backup against very low-curve decks, such as tokens, etc.