Activate O'aka by tapping it and removing a counter from a nonland permanent, causing you to draw a card.
Chasm Skulker triggers, putting a counter on it.
Activate Mind Over Matter by discarding a card, untapping O'aka.
Repeat.

Infinite self-discard triggers

Infinite draw triggers

Infinite looting

O'aka, Traveling Merchant

Mind Over Matter

Chasm Skulker

Activate Sensei's Divining Top's second ability by tapping it, causing you to draw a card and put Sensei's Divining Top on top of your library.
Chasm Skulker triggers, putting a +1/+1 counter on it.
Cast Sensei's Divining Top from the top of your library by paying {0} and removing a counter from a creature you control.
Repeat.

Near-infinite artifact ETB

Near-infinite artifact LTB

Infinite card draw

Near-infinite storm count

Falco Spara, Pactweaver

Sensei's Divining Top

Cloud Key

Tap Gilded Lotus for {U}{U}{U} and Khalni Gem for {R}{R}.
Pay this mana to activate Nin, the Pain Artist's ability targeting Chasm Skulker.
Chasm Skulker gets 3 damage marked on it and goes to 1 toughness.
You draw 3 cards from Nin, the Pain Artist and Chasm Skulker gets 3 +1/+1 counters placed on it, making its toughness go back up to 7 with 3 damage marked on it for a net of 4.
Discard the three cards you drew from Nin, the Pain Artist to untap Gilded Lotus, Khalni Gem, and Nin, the Pain Artist.
Repeat.

Near-infinitely large creature

Nin, the Pain Artist

Khalni Gem

Gilded Lotus

Activate Sensei's Divining Top's second ability by tapping it, causing you to draw a card and put Sensei's Divining Top on top of your library.
Chasm Skulker triggers, putting a +1/+1 counter on it.
Cast Sensei's Divining Top from the top of your library by paying {1} and removing a counter from a creature you control.
Glaring Fleshraker's first ability triggers, creating a 0/1 Eldrazi Spawn creature token.
When the Eldrazi Spawn enters, Glaring Fleshraker's second ability triggers, dealing 1 damage to each opponent.
Activate the Eldrazi Spawn by sacrificing it, adding {C}.
Repeat.

Combos with "Chasm Skulker"