The caster creates a bubble with a 10 radius centered around the caster. Any creature in the bubble has 2 hit points healed. If a creature in the bubble is vulnerable to silver or is undead, they take 2 damage instead, and have their movement speed halved. Constructs do not heal or take damage in the bubble.

At Higher Levels
The bubble's radius increases by 5 feet, and the damage dealt/hit points healed increases by 2.

Potential changes for your game: Abrith is one of my homebrew settings, using a TRPG system I am making. In this system, spell damage is static. If you want to roll damage/healing instead of doing static damage/healing, roll 1d4, with higher levels dealing an additional d4.