Karmic Guide

Creature — Angel Spirit

Flying, protection from black Echo {3}{W}{W} (At the beginning of your upkeep, if this came under your control since the beginning of your last upkeep, sacrifice it unless you pay its echo cost.) When this creature enters, return target creature card from your graveyard to the battlefield.

Don't call it necromancy. Call it a revival of vintage creatures.

ArtistaTsubonari