You create a zone of warding around you that hedges out otherworldly creatures, such as celestials, fey, fiends, and elementals. These creatures can’t enter or pass through the zone. In addition, the zone blocks teleportation, ethereal travel, and conjuration spells. Creatures can’t cast teleportation or conjuration spells within the zone, nor can they cast these spells through the zone. Creatures affected by spells or features that allow ethereal travel or teleportation can’t enter the zone for the duration.

At Higher Levels. When you cast this spell using a spell slot of 7th level or higher, the zone’s radius increases by 10 feet for every two slot levels above 5th