Combos with Night of Souls' Betrayal

1. All creatures your opponents control will have base toughness 0, and die as a state-based action due to having 0 toughness unless there is another effect increasing its toughness.
2. Whenever a creature enters the battlefield under an opponent's control, it will have base toughness 0, and die as a state-based action due to having 0 toughness unless there is another effect increasing its toughness.

When a land enters the battlefield, it becomes a Swamp due to Kormus Bell. This then causes it to become a 0/0 creature due to Urborg and Night of Souls' Betrayal, and die as a state-based action due to having 0 toughness.

1. Humility makes all creatures lose all abilities and sets their power and toughness to 1/1.
2. Night of Souls' Betrayal gives all creatures -1/-1.
3. Creatues lose ETB and LTB abilities and die when played.

1. Activate Vhati il-Dal by tapping it, causing any other creature to have base toughness 1 until end of turn.
2. The creature dies as a state-based action due to having zero or less toughness.
3. Vhati il-Dal triggers, untapping itself.
4. Repeat.
5. You may also repeat this process whenever a creature enters the battlefield.

1. Cast Gravecrawler from your graveyard by paying {B}.
2. Gravecrawler enters the battlefield as a 1/0 due to Night of Souls' Betrayal, and dies as a state-based action due to having zero toughness.
3. Pitiless Plunderer triggers, creating a Treasure token.
4. Activate the Treasure by tapping and sacrificing it, adding {B}.
5. Repeat.

1. Godhead of Awe causes all other creatures to have base power and toughness of 1/1.
2. Night of Souls' Betrayal gives all other creatures -1/-1.
3. Any creature that enters the battlefield will do so as a 0/0 creature, and will die as a state-based action due to having zero or less toughness.

1. Cast Bloodline Necromancer by paying {4}{B}.
2. Bloodline Necromancer enters the battlefield and dies as a state-based action due to having zero or less toughness.
3. Bloodline Necromancer enters the battlefield, returning itself from your graveyard to the battlefield.
4. Repeat from step 2.

1. Cast Tatterkite by paying {3}.
2. Tatterkite enters the battlefield and dies as a state-based action due to having 0 toughness.
3. Tatterkite's undying ability triggers, returning it from your graveyard to the battlefield with zero +1/+1 counters on it due to its effect.
4. Repeat from step 2.
5. NOTE: This combo creates a mandatory infinite loop that will draw the game if it isn't interacted with.

1. Activate Workhorse by removing a +1/+1 counter from it, adding {C}.
2. Repeat step 1 until Workhorse does not have any +1/+1 counters on it.
3. Workhorse dies as a state-based action due to having zero toughness.
4. Workhorse's undying ability triggers, returning it from your graveyard to the battlefield with five +1/+1 counters on it.
5. Repeat.

1. Cast Cryptic Trilobite for X = 0 by paying {0}.
2. Cryptic Trilobite dies due to having zero toughness.
3. Cryptic Trilobite's undying ability from Mikaeus triggers, returning it to the battlefield with a +1/+1 counter.
4. Activate Cryptic Trilobite by removing the +1/+1 counter from it, adding {C}{C} that can only be spent on activated abilities.
5. Repeat from step 2.

1. Activate Skullclamp by paying {1}, attaching it to a creature with toughness equal to 1.
2. The creature dies as a state-based action due to having 0 or less toughness, triggering Skullclamp and Pitiless Plunderer.
3. Resolve the Skullclamp trigger, causing you to draw two cards.
4. Resolve the Pitiless Plunderer trigger, creating a Treasure token and a 1/1 Thopter artifact creature token.
5. Activate the Treasure by tapping and sacrificing it, adding {1}.
6. Repeat.

1. Cast Endless Swarm by paying {5}{G}{G}{G}.
2. Eye of the Storm and Hive Mind trigger.
3. Resolve the Eye of the Storm trigger, exiling Endless Swarm, and then copying each instant and sorcery card exiled with Eye of the Storm, and allowing you to cast the copies without paying their mana costs.
4. Choose not to cast the copy of Endless Swarm as permitted by Eye of the Storm.
5. Resolve the Hive Mind trigger from step 2, causing each opponent to copy Endless Swarm.
6. Resolve the first opponent's copy of Endless Swarm, causing them to create a 1/1 Snake creature token for each card in their hand, and then be unable to cast spells for the rest of the game.
7. The Snakes enter the battlefield and die as a state-based action due to having 0 toughness.
8. Repeat from step 6 for each remaining Endless Swarm copy.
9. At the beginning of each opponent's upkeep, their copy of Endless Swarm triggers, copying itself.
10. Resolve the copy of Endless Swarm, causing the opponent to create a 1/1 Snake creature token for each card in their hand.
11. The Snakes enter the battlefield and die as a state-based action due to having 0 toughness.
12. Repeat from step 9.

1. Cast Gravecrawler from your graveyard by paying {B}.
2. Gravecrawler enters the battlefield and dies as a state-based action due to having zero toughness.
3. Carnival of Souls and Falkenrath Noble trigger.
4. Resolve the Falkenrath Noble trigger, causing target opponent to lose 1 life and you to gain 1 life.
5. Resolve the Carnival of Souls trigger, causing you to lose 1 life and add {B}.
6. Repeat.

1. Draw a card.
2. The Locust God triggers, creating a 1/1 Insect creature token.
3. The Insect enters the battlefield and dies as a state-based action due to having zero toughness.
4. Liliana triggers, causing you to draw a card.
5. Repeat from step 2.

1. Cast Rot Hulk by paying {5}{B}{B}.
2. Rot Hulk dies as a state-based action due to having zero toughness.
3. Bastion of Remembrance triggers, causing each opponent to lose 1 life and you to gain 1 life.
4. Rot Hulk's enter the battlefield trigger is put onto the stack.
5. Resolve the Rot Hulk trigger, returning Rot Hulk from your graveyard to the battlefield.
6. Repeat from step 2.