Crack Open a booster pack
You only play it when you want the reusable graveyard but the life gain is what makes it playable
Erayo, Soratami Ascendant Floodbringer Genku, Future Shaper Guardians of Oboro Katsumasa, the Animator Kotori, Pilot Prodigy Living Breakthrough Meloku the Clouded Mirror Moonbow Illusionist Moonfolk Puzzlemaker Network Disruptor Oboro Breezecaller Oboro Envoy Replication Specialist Research Thief Rooftop Saboteurs Saiba Cryptomancer Saiba Trespassers Soratami Cloudskater Soratami Mindsweeper Soratami Mirror-Guard Soratami Mirror-Mage Soratami Rainshaper Soratami Savant Soratami Seer Tameshi, Reality Architect Tamiyo, Inquisitive Student Uyo, Silent Prophet Wonderscape Sage
Well - the main reason Karrthus is good IS the haste effect - the rest is basically a minor upside, and a potentially catastrophic downside if turned against you
Both characters deal damage simultaneously, equal to their Strength value
Necromancer is a tool to make a little go a long way while being a passable stand alone card