Ellyn's Force Shield

A barrier of magical force appears and protects you from dangerous harms. The barrier has 2d8 Hit Points. Until the start of your next turn, any damage you would take is instead absorbed by the barrier, the spell ends earlier if the barrier drops to 0 Hit Points. psychic damage penetrates the barrier and is not affected by this spell. At the end of each turn which this spell is still active you can gather all the remaining Hit Points into a force bolt, ending the spell earlier and hurl it at a creature within range, making a ranged spell attack, on a hit the creature takes force damage equal to the remaning Hit Points gathered this way.

At Higher Levels: When you cast this spell using a spell slot of 2nd level or higher the Barrier's Hit Points increase by 1d8 for each level above the 1st