Activate Warren Soultrader by paying 1 life and sacrificing Gravecrawler, creating a Treasure token.
When the Treasure enters the battlefield, Kambal's second ability triggers, causing each opponent to lose 1 life and you to gain 1 life.
Activate the Treasure by tapping and sacrificing it, adding {B}.
Cast Gravecrawler from your graveyard by paying {B}.
Repeat.

Infinite LTB

Infinite ETB

Infinite sacrifice triggers

Infinite death triggers

Infinite lifegain triggers

Infinite lifegain

Infinite storm count

Infinite lifeloss

Warren Soultrader

Gravecrawler

Kambal, Profiteering Mayor

Cause a token to enter the battlefield under your control.
Kambal's second ability triggers, causing each opponent to lose 1 life and you to gain 1 life.
Trudge Garden triggers, causing you to pay {2} to create a 4/4 Fungus Beast creature token.
Kambal's second ability triggers, holding priority, activate Ashnod's Altar by sacrificing the Fungus Beast, adding {C}{C}.
Resolve the Kambal trigger, causing each opponent to lose 1 life and you to gain 1 life.
Repeat from step 3.

Trudge Garden

Ashnod's Altar

Gain life.
The Destined White Mage triggers, putting a +1/+1 counter on a creature you control.
Animation Module triggers, causing you to pay {1} to create a 1/1 Servo artifact creature token.
When the Servo enters, Kambal triggers, causing you to gain life and each opponent to lose life
The Destined White Mage triggers. Holding priority, activate Krark-Clan Ironworks by sacrificing the Servo, adding {C}{C}.
Resolve the The Destined White Mage trigger, putting a +1/+1 counter on a creature you control 
Repeat from step 3.

Infinite +1/+1 counters on creatures you control

Infinite colorless mana

Animation Module

Krark-Clan Ironworks

The Destined White Mage

Cause a token to enter the battlefield under your control.
Kambal's second ability triggers, causing each opponent to lose 1 life and you to gain 1 life.
Trudge Garden triggers, causing you to pay {2} to create a 4/4 Fungus Beast creature token.
Kambal's second ability and Mana Echoes trigger.
Resolve the Mana Echoes trigger, adding {C} for each Fungus and Beast on the battlefield.
Resolve the Kambal trigger, causing each opponent to lose 1 life and you to gain 1 life.
Repeat from step 3.

Infinite creature tokens

Mana Echoes

Combos with "Kambal, Profiteering Mayor"