AG's Boon of the Anti-Mage (Wisdom)

You have advantage on saving throws against spells and other magical effects. When you force a concentration check on a creature that is concentrating on a spell, the save DC to maintain concentration is 15 at minimum. You can cast Dispel Magic at-will without expending a spell slot or using material components as long as the target is a willing creature. You choose the spellcasting ability for this spell when you take this boon.