Last Strike

1st-level abjuration

Casting Time: 1 reaction, which you take when you drop to 0 hit points as a result of taking damage

Range: Self

Components: V, S

Duration: 1 round

You grant yourself a last burst of energy when deeply wounded. Before you fall unconscious, you gain one action. Any roll you make, such as for an ability check or attack roll, has advantage. You automatically fail your first death saving throw.