You have mastered casting spells, either by years of practice or otherworldly intervention. You gain the following:

Any spell that requires an attack roll, the range is doubled.
Your spells ignore half and three-quarters cover.
You no longer suffer disadvantage when casting spells in close range.
You can use any weapon or worn item as your spell focus.
You gain a +1 in Cha, Int, or Dex.
You gain twice proficiency with spell attacks.
Choice of Cantrip.

This does not stack with the War Caster Feat or any other range altering feats.