Stealth Master

You have perfected the art of hiding beyond mortal capabilities. You gain the following traits:

• You can successfully Hide from creatures with blindsight or tremorsense if your Dexterity (Stealth) check beats their Wisdom (Perception) check, and you rolled at least a 30 on your Dexterity (Stealth) check.
• While hidden from a creature, you are immune to any spells or effects created by that creature, even if they would normally hit you (such as the area of effect of a fireball spell).
• If you see a creature cast a spell or make an attack while you are hidden from it, you can use your reaction to make an opportunity attack against that creature. Hit or miss, you can then attempt to Hide from the creature again as part of the same reaction.