Activate the creature by tapping it, dealing 1 damage to any opponent's creature and causing you to gain 1 life.
The opponent's creature dies due to deathtouch, triggering Thornbite Staff, untapping your creature.
Repeat.

Destroy all creatures opponents control

Destroy all creatures opponents control whenever a creature enters the battlefield

Thornbite Staff

Lavamancer's Skill

Basilisk Collar

Activate Cacophodon by tapping it, dealing damage to any target.
Guilty Conscience triggers, dealing damage to Cacophodon.
Cacophodon triggers, untapping itself.
Repeat.

Infinite damage

Cacophodon

Guilty Conscience

Give Eater of the Dead deathtouch by any method.
Activate Eater of the Dead by tapping it, dealing 1 damage to any nontoken creature an opponent controls.
The creature dies due to Eater of the Dead's deathtouch.
Activate Eater of the Dead by paying {0}, exiling the creature card from its owner's graveyard  and untapping Eater of the Dead.
Repeat.
You may also repeat this loop whenever a creature enters the battlefield under an opponent's control.

Destroy all creatures that enter the battlefield under an opponent's control

Destroy any number of creatures opponents control

Exile all creature cards that are put into an owner's graveyard

Eater of the Dead

Activate the Spider with Thornbite Staff and Lavamancer's Skill attached by tapping it, dealing 1 damage to a creature an opponent controls and destroying it due to the Spider's deathtouch.
When the creature dies, Shelob and the Spider tapped in step 1 trigger.
Resolve the Shelob trigger, creating a token copy of the creature that died that is a Food artifact.
Resolve the Spider trigger, untapping it.
Repeat as desired. You can also repeat this loop whenever a creature enters the battlefield under an opponent's control.

Shelob, Child of Ungoliant

Activate Warchanter Skald using the Lavamancer's Skill ability by tapping it, targeting any creature.
Warchanter Skald triggers, creating a 2/1 Dwarf Berserker token.
Intruder Alarm triggers, untapping all creatures.
Repeat.

Infinite creature tokens

Infinite damage to creatures

Infinite death triggers

Infinite ETB

Infinite LTB

Infinite untap of all creatures

Infinite mana creatures you control can produce

Warchanter Skald

Intruder Alarm

Activate Avenging Druid by tapping it, dealing 1 damage to an opponent.
Avenging Druid triggers, causing you to reveal a land card from your library and put it onto the battlefield, and put all other cards revealed this way into your graveyard.
When the land enters the battlefield, Retreat to Coralhelm triggers, untapping Avenging Druid.
Repeat until no lands remain in your library and/or your library is empty.

Near-infinite damage

Infinite self-mill

Near-infinite landfall triggers

Put all land cards from your library onto the battlefield

Avenging Druid

Retreat to Coralhelm

Activate Wylie Duke by tapping it.
Wylie Duke triggers, causing you to draw a card and gain 1 life.
Resolve the Wylie Duke ability, dealing 1 damage to any target.
Activate Mind over Matter by discarding a card, untapping Wylie Duke.
Repeat.

Infinite draw triggers

Infinite looting

Infinite self-discard triggers

Near-infinite lifegain

Near-infinite lifegain triggers

Wylie Duke, Atiin Hero

Mind Over Matter

Activate Morselhoarder by tapping it, dealing 1 damage to any target.
Activate Morselhoarder by paying {1} and putting a -1/-1 counter on it, untapping it.
Activate Morselhoarder by removing a -1/-1 counter from it, adding {1}.
Repeat.

Morselhoarder

Sinking Feeling

Combos with "Lavamancer's Skill"