Displacer Mark

This spell is always treated as "Hunter's Mark"

You magically mark one creature you can see within range as the object of your Monstrous Fury. Until the spell ends, You are immune to the affects of difficult terrain. You deal an extra 1d12 Force damage to the target whenever you hit it with an attack roll additionally attack the marked creature makes against you are at disadvantage. You gain 15ft of Blindsight.

If the target drops to 0 Hit Points before this spell ends, you can take a Bonus Action or reaction to move the mark to a new creature you can see within range.

Using a Higher-Level Spell Slot. Your Concentration can last longer with a spell slot of level 4 (up to 8 hours) or 5+ (up to 24 hours).