Activate Tetzimoc by paying {B} and revealing it from your hand, targeting a creature an opponent controls.
Horobi triggers, destroying that creature.
The creature dies, triggering Revel in Riches' first ability, creating a Treasure token.
Activate the Treasure token by tapping and sacrificing it, adding {B}.
Repeat.

Destroy any number of creatures opponents control during each of your turns

Tetzimoc, Primal Death

Horobi, Death's Wail

Revel in Riches

Activate Tetzimoc by paying 2 life and revealing it from your hand, targeting a creature an opponent controls.
Horobi triggers, destroying that creature.
The Tetzimoc ability fails to resolve  due to no longer having a legal target.
The creature dies, triggering Deathgreeter and Blood Artist.
Resolve the Deathgreeter trigger, causing you to gain 1 life.
Resolve the Blood Artist trigger, causing target player to lose 1 life and you to gain 1 life.
Repeat.

Destroy any number of target creatures during each of your turns

K'rrik, Son of Yawgmoth

Blood Artist

Deathgreeter

Activate Tetzimoc by paying 2 life and revealing it from your hand, targeting a creature an opponent controls.
Horobi triggers, destroying that creature.
The Tetzimoc ability fails to resolve  due to no longer having a legal target.
The creature dies, triggering Dross Harvester, causing you to gain two life.
Repeat.

Combos with "Tetzimoc, Primal Death"