Defensive Dome (5e Spell)
From D&D Wiki
|Casting time:||1 reaction|
If you or a creature you can see within 30 feet of you is hit with a ranged weapon or spell attack, you can use a reaction to have a dome of force spring into being centered on a point you choose within range, and lasts for the duration of the spell or until it is broken. The dome is 15ft in radius and has 40 hit points. The dome absorbs damage from attacks and spells from outside it until its hit points are reduced to zero, at which point excess damage carries over onto creatures and objects inside the dome.
At Higher Levels: When you cast this spell using a spell slot of 3rd level or higher the dome's hit points increase by 10 for each spell slot above 2nd