Activate Kuro by paying 1 life.
Repeat step 1 until you have 0 life.
Resolve all Kuro abilities.
Cast Repay in Kind by paying {5}{B}{B}, causing each opponent's life total to become 0.
Each opponent loses the game as a state-based action due to having 0 life.

Each opponent loses the game

Near-infinite lifeloss for all players

Permanent with "You don't lose the game due to having 0 or less life"

Repay in Kind

Kuro, Pitlord

Activate Kuro by paying 1 life.
Vilis triggers, causing you to draw a card.
Sheoldred's first ability triggers, causing you to gain 2 life.
Repeat as desired.
Resolve all Kuro abilities, giving a creature -1/-1 until end of turn for each ability.

Infinite card draw

Infinite draw triggers

Near-infinite lifegain

Near-infinite lifegain triggers

Sheoldred, the Apocalypse

Vilis, Broker of Blood

Activate Kuro by paying life.
Repeat step 1 as desired.
Activate Rowan by tapping it, reducing the cost of all black and/or red spells you cast this turn.
Cast Exsanguinate, choosing for X to equal the amount of life you've lost this turn, but paying a total of {B}{B} due to Rowan.
Resolve Exsanguinate, causing each opponent to lose X life, and you to gain life equal to the life lost this way.

Near-infinite lifeloss

Rowan, Scion of War

Exsanguinate

Activate Vizkopa Guildmage's second ability by paying {1}{W}{B}, causing each opponent to lose life whenever you gain life this turn.
Activate Kuro by paying 1 life.
Repeat step 2 until you have 1 life.
Activate Children of Korils by sacrificing it, causing you to gain life equal to the amount of life you've lost this turn.
Vizkopa Guildmage triggers, causing each opponent to lose life equal to the amount of life you gained.

Children of Korlis

Vizkopa Guildmage

Activate Kuro by paying 1 life, targeting any creature not used for this combo.
Holding priority, repeat the previous step until you have 1 life remaining.
Resolve all Kuro abilities.
Cast Repay in Kind by paying {5}{B}{B}, causing all life totals to become 1.
Cast Temporal Extortion by paying {B}{B}{B}{B}.
If an opponent pays 1 life to counter it, that opponent's life total becomes 0, they lose the game, and you skip the next step.
Otherwise, resolve Temporal Extortion, gaining an extra turn.
Activate Canal Dredger by tapping it, putting Temporal Extortion from your graveyard on the bottom of your library.
Declare Varragoth as an attacker.
Activate Varragoth's Boast ability by paying {1}{B}, searching your library for Temporal Extortion and putting on top of your library.
Go to your next turn.
Draw Temporal Extortion in your draw step.
Repeat from step 7.

On each of your turns, you take an extra turn unless an opponent chooses to lose the game

Lock

Varragoth, Bloodsky Sire

Temporal Extortion

Canal Dredger

Activate Vizkopa Guildmage by paying {1}{W}{B}, causing each opponent to lose life whenever you gain life this turn.
Activate Kuro by paying 1 life, targeting any creature.
Repeat step 2 until you have one life.
Resolve all Kuro abilities, giving the creature -1/-1 for each ability.
Cast Oketra's Last Mercy by paying {1}{W}{W}, causing your life total to become forty.
Vizkopa Guildmage triggers, causing each opponent to lose thirty-nine life.
Each opponent loses the game due to having zero or less life.

Oketra's Last Mercy

Activate Kuro by paying 1 life.
Repeat step 1 until Greven has power 21 or greater due to its first ability.
Deal combat damage to an opponent using Greven. The opponent loses the game due to being dealt 21 or more combat damage from your commander.

Target opponent loses the game

Greven, Predator Captain

Activate Kuro by paying life.
Repeat step 1 as desired.
Activate Rowan by tapping it, reducing the cost of all black and/or red spells you cast this turn.
Cast a copy of Exsanguinate, choosing for X to equal the amount of life you've lost this turn, but paying a total of {B}{B} due to Rowan.
Resolve Exsanguinate, causing each opponent to lose X life, and you to gain life equal to the life lost this way.

Combos with "Kuro, Pitlord"