Cause a creature to enter the battlefield under your control.
Elrond triggers, causing you to scry 1.
Arwen Undómiel triggers, putting a +1/+1 counter on Herd Baloth.
Herd Baloth triggers, creating a 4/4 Beast creature token.
Repeat from step 2.

Infinite +1/+1 counters on a creature

Infinite creature tokens

Infinite creature ETB

Infinite scry 1

Arwen Undómiel

Elrond, Lord of Rivendell

Herd Baloth

Cause a creature to enter the battlefield under your control.
Elrond triggers, causing you to scry 1.
Arwen Undómiel triggers, putting a +1/+1 counter on Scurry Oak.
Scurry Oak triggers, creating a 1/1 Squirrel creature token.
Repeat from step 2.

Scurry Oak

Cause a creature to enter the battlefield under your control.
Elrond triggers, causing you to scry 1.
Arwen Undómiel triggers, putting a +1/+1 counter on Basking Broodscale.
Basking Broodscale triggers, creating a 0/1 Eldrazi Spawn creature token.
Repeat from step 2.

Infinite creature LTB

Infinite creature sacrifice triggers

Infinite death triggers

Infinite colorless mana

Basking Broodscale

Cause a creature to enter the battlefield under your control.
Elrond triggers, causing you to scry 1.
Arwen Undómiel triggers, putting a +1/+1 counter on Berta
Berta and Animation Module trigger.
Resolve the Berta trigger, adding {1}.
Resolve the Animation Module trigger, causing you to pay {1} to create a 1/1 Servo artifact creature token.
Repeat from step 2.

Infinite artifact ETB

Animation Module

Berta, Wise Extrapolator

Cause a creature to enter the battlefield under your control.
Elrond triggers, causing you to scry 1.
Arwen Undómiel triggers, putting a +1/+1 counter on Crystalline Crawler.
Animation Module triggers. Holding priority, activate Crystalline Crawler by removing a +1/+1 counter from it, adding {1}.
Resolve the Animation Module trigger, causing you to pay {1} to create a 1/1 Servo artifact creature token.
Repeat from step 2.

Crystalline Crawler

Activate the mana-producing creature by tapping it, adding at least {G}.
Activate Llanowar Mentor by paying {G}, tapping it and discarding a card, creating a 1/1 Llanowar Elves creature token.
The Llanowar Elves token enters the battlefield, triggering Intruder Alarm and Elrond.
Resolve the Intruder Alarm trigger, untapping all creatures.
Resolve the Elrond trigger, causing you to draw a card.
Repeat from step 2.

Combos with "Elrond, Lord of Rivendell"