Shadows of the Past

Adrian can tap into more of the magic typical of your dark elf past. You know the detect magic spell and can cast it at will, without expending a spell slot. You also learn Darkvision at 3rd level and Spirit Guardians at 5th level, each of which you can cast once without expending a spell slot. You regain the ability to cast those two spells in this way when you finish a long rest. Constitution is your spellcasting ability for all three spells This ability allows you to cast detect magic on yourself at will, without needing a material component. You can also cast each of the following spells once with this ability: darkvision, and spirit guardians. You regain the ability to cast these spells when you finish a long rest.

Constitution is your spellcasting ability for these spells, and you cast them at their lowest possible levels.