Cast Leashling by paying {0}.
Leashling enters the battlefield, triggering Guardian Project, causing you to draw a card.
Activate Leashling by putting a card from your hand on top of your library, returning Leashling to your hand from the battlefield.
Repeat.

Infinite draw triggers

Infinite ETB

Infinite LTB

Infinite storm count

Leashling

Mycosynth Golem

Guardian Project

Cast Stinkweed Imp by paying {B} due to The Sibsig Ceremony.
When Stinkweed Imp enters, The Sibsig Ceremony and Guardian Project trigger.
Holding priority, activate Phyrexian Altar by sacrificing Stinkweed Imp, adding {B}.
Resolve the Sibsig Ceremony trigger, failing to destroy Stinkweed Imp as it's no longer on the battlefield and creating a 2/2 Zombie Druid creature token.
Resolve the Guardian Project trigger, causing you to mill five cards and return Stinkweed Imp from your graveyard to your hand due to Stinkweed Imp's dredge ability.
Repeat.

Infinite self-mill

Near-infinite ETB

Near-infinite storm count

Near-infinite LTB

Near-infinite death triggers

Near-infinite sacrifice triggers

Near-infinite colored mana

Near-infinite creature tokens

The Sibsig Ceremony

Phyrexian Altar

Stinkweed Imp

Cast Shield Sphere by paying {0}.
Tangleroot triggers, adding {G}.
When Shield Sphere enters the battlefield, Guardian Project triggers.
Holding priority, activate Words of Wind by paying {1}, replacing the next card you draw.
Resolve the Guardian Project trigger, causing you to return Shield Sphere from the battlefield to your hand, and causing each opponent to return a permanent they control from the battlefield to your hand.
Repeat.

Return all permanents opponents control to their owner's hand

Mass Land Denial

Tangleroot

Words of Wind

Shield Sphere

Cast Forsaken Miner by paying {B}.
When Forsaken Miner enters, Guardian Project triggers.
Holding priority, activate Phyrexian Altar by sacrificing Forsaken Miner, adding {B}.
Resolve the Guardian Project trigger, causing you to draw a card.
Lyla triggers, targeting a creature an opponent controls.
Forsaken Miner triggers, causing you to pay {B} to return Forsaken Miner from your graveyard to the battlefield.
Repeat from step 2.
Resolve all Lyla triggers.

Infinite card draw

Near-infinite +1/+1 counters on a creature an opponent controls

Lyla, Holographic Assistant

Forsaken Miner

Combos with "Guardian Project"