The Arcanist Supreme

As an arcanist who has mastered the intricacies of magic, you have honed your spells to be more potent and resilient against disruption. This feat grants you the following benefits:

• Enhanced Spell Potency: When you cast a spell using a spell slot higher than the spell's original level, and the spell gains no additional benefits from being upcast, you can increase the spell's save DC or spell attack roll by +1 for each slot level above its original.
  
• Counterspell Resistance: Your spells are uniquely fortified against being countered. A spell you cast can only be countered by a Counterspell that is cast using a spell slot of the same level as the spell slot you used, or higher.