Researcher/Magic Sense

Epic Spells

At 13th level, you become able to learn and cast spells of 10-points or higher, but these are not as easy to cast as other spells. Once you cast a 10-point spell, you cannot cast another one of the same increment (10-point) until you finish a long rest. This is the same case with all spells of 10-points or higher. By 17th level, you can cast one spell of each increment—10-point, 11-point, 12-point, and 13-point—between long rests.

Magic Sense

Magic has become ingrained in your mind so thoroughly it is influencing your senses. Starting from 13th level, you have advantage on Intelligence (Investigation) and Wisdom (Perception) checks to notice spells or magic effects.

You learn the detect magic spell per your Spellcasting feature, but it doesn't count against your Spells Known. If you already have learned this spell, you can instead learn another 2-point (1st-level) researcher spell you would otherwise be able to learn. You can cast detect magic without expending magic points (or a spell slot).