I think this is a low-key strong deck. I've been powering through Diamond with it over the last week:

Creature (20)
4 Drannith Healer
4 Hollow One
4 Drannith Stinger
4 Flourishing Fox
4 Valiant Rescuer

Sorcery (4)
4 Go for Blood

Instant (4)
4 Zenith Flare

Enchantment (8)
4 Footfall Crater
4 Cast Out

Land (24)
7 Plains
5 Mountain
4 Forgotten Cave
4 Secluded Steppe
4 Needleverge Pathway

Sideboard (15)
4 Baffling End
3 Forsake the Worldly
3 Sweltering Suns
2 Reptilian Reflection
1 Abandoned Sarcophagus
1 Jegantha, the Wellspring
1 Grafdigger's Cage

I've only tried it in BO1 so far. If I catch an opponent that didn't keep removal, the Fox makes quick work of them. Cast Out and Go For Blood are great, but it is usually correct to just cycle them away.

I feel like the mana base could be working harder for me. Some number of man-lands would give the deck additional reach to knock out a control pilot that is about to stabilize.