There was a complementary theme with the death trigger on "Pharaoh's Embalmers" that inspired me. I think it makes sense to play up rebirth in white while using black's traditional slice of the color pie to take advantage of death, and I think morbid is a perfect fit for that.
Priest of Anubis
1B
Creature - Human Cleric
Morbid - Sacrifice CARDNAME: draw 2 cards and lose 2 life. Activate this ability only if a creature died this turn.
1/1
Hound of Set
2B
Creature - Hound
Whenever CARDNAME attacks, you may sacrifice a creature, if you do, CARDNAME gets +2/0 and intimidate until EOT
2/2
Marsh Crocodile
3B
Creature - Crocodile
3/1
Sacrifice a creature: Regenerate CARDNAME
Sacrificial Lamb
3B
Instant
As an additional cost to cast CARDNAME, sacrifice a creature.
Cardname deals 3 damage to target creature or player, and you gain 3 life.
Unpurified Dead
B
Creature - Zombie
1/1
When CARDNAME dies, you may pay B. If you do, return CARDNAME or target creature from your graveyard to your hand.
Asp's Strike
1B
Instant
Target creature gets -2/-2 until EOT
Morbid - Destroy that creature instead if a creature died this turn.