Blend

While in one of your favored terrains you can blend yourself seamlessly into that terrain becoming part of the terrain and effectively invisible, however with a -5 temporary reduction on your AC until the spell ends and you cannot use your movement.  Being blended does not grant you immunity to detection by magical means however Perception rolls and all attack rolls against you have disadvantage.

While blended any Stealth checks or saves you make have an additional 1d20 to your normal roll.  You also add 1d10 to your normal roll on Investigation or Perception checks on any creature within 20ft of you.

While blended all Attacks you make have advantage plus Ranged Attacks add 1d10 to your normal attack roll.  Ranged attacking while blended does not end the spell or reveal your location, Melee attacks while blended immediately ends the spell and reveal your location.

To dispell the effect during initiative will cost an Action.

If you are hit by any attack, including Melee, Ranged, or an Area of Effect the spell instantly ends and you are knocked prone.

Casting at 4th level removes the temporary AC reduction, however the spell does not come into effect until the start of your next turn and if you are attacked and hit in that time the spell fails and the spell slot is still consumed.

Casting at 5th level removes the temporary AC reduction and give you a temporary +5 AC Bonus, grants immunity to detection by any means, allows you to end the spell as a Bonus Action instead, and you are not knocked prone if hit by an attack or its area of effect, however the spell does not come into effect until the start of your next turn and if you are attacked and hit in that time the spell fails and the spell slot is still consumed.