Just a simple $25 enchantment deck
Witchstalker or Gladecover Scout are turned into massive creatures by enchantments like Gift of Orzhova, Unflinching Courage and Ethereal Armor that are hard for your opponents to kill.
If you don't get either of these creatures in your opening hand you can use Fleecemane Lion or Fabled Hero and make them hexproof with Alpha Authority
Example of game
Turn 1: Play Forest, Play Gladecover Scout
Turn 2: Play Sunpetal Grove, enchant Gladecover Scout with Ethereal Armor. Swing for 2 first strike
Turn 3: Play Plains, enchant Gladecover Scout with Gift of Orzhova. Swing for 4 first stike, flying lifelink. Gain 4 life
Turn 4: Play Sunpetal Grove, enchant Gladecover Scout with Unflinching Courage and a second Ethereal Armor. Swing for 11 First strike, Flying, Lifelink, Trample. Gain 11 life
Turn 5: Win
OR
Turn 1: Plains
Turn 2: Sunpetal Grove, Fleecemane Lion
Turn 3: Forest, Enchant Fleecemane Lion with Alpha Authority and Ethereal Armor. Swing for 5 hexproof, first strike
Turn 4: Plains, Enchant Fleecemane Lion with Unflinching Courage and a second Ethereal Armor. Swing for 15 Trample, first strike, lifelink, hexproof. Possibly win
This is a slightly edited version of my Journey into nyx standard deck, so help is welcome to make it optimised for modern. +1 if you like it