Lifebinding Spirit

Radiant Spell, Tier 1, 1 Action, Single Target

Summon a spirit companion that follows you and is immune to harm. It lasts until you cast this spell again, take a Safe Rest, or it heals a number of times equal to the mana spent summoning it.

Action: It attacks or heals a creature within Reach 4. It attacks for 1d6+WIL radiant damage (ignoring armor), or heals for the same amount.

Upcast: Increment its die size by 1 (max d12), +1 healing use.

Flavor is free. Your Lifebinding Spirit can take the form of any small friendly animal or similar creature (dog, lamb, rabbit, sparrow, etc.). Make sure you give your little buddy a name, too!

Outside of combat. Your companion is a spirit, so it can pass through walls and dangers harmlessly. It can briefly move away from you (but always prefers to be faithfully at your side). It cannot speak.

From Core Rules