Whenever you create a Reanimated Companion, it gains one of the following options of your choice; choose when you create the companion.
Arcane Conduit
You can cast spells as though you were in the companion's space, but you must use your own senses. Once per turn, when you cast an Artificer spell from the Evocation or Necromancy school and deal damage while your companion is within 120 feet of you, you can add your Intelligence modifier to one damage roll of that spell.
Ferocity
The damage die of the companion's Dreadful Swipe increases to 1d6.