Activate Goblin Bombardment by sacrificing the creature with power four or greater.
The creature dies, triggering Warbeast of Gorgoroth twice, creating a 0/0 Army creature token if you don't control one, then putting four +1/+1 counters on an Army you control.
Resolve the Goblin Bombardment ability, dealing 1 damage to any target.
Repeat.

Infinite damage

Infinite death triggers

Infinite creature ETB

Infinite creature LTB

Infinite creature sacrifice triggers

Warbeast of Gorgoroth

Drivnod, Carnage Dominus

Goblin Bombardment

Activate Carrion Feeder by sacrificing the creature with power 4 or greater.
When the creature dies, Warbeast of Gorgoroth triggers, creating a 0/0 Army creature token if you don't control one, then putting four +1/+1 counters on an Army you control.
Resolve the Carrion Feeder ability, putting a +1/+1 counter on Carrion Feeder
Repeat.

Infinite +1/+1 counters on a creature

Corpsejack Menace

Carrion Feeder

Cast The Balrog from the command zone by paying {B}{R}.
Activate Phyrexian Altar by sacrificing The Balrog, adding {B}.
Choose to return The Balrog to the command zone from your graveyard.
When The Balrog dies, it and Warbeast of Gorgoroth trigger.
Resolve the Balrog trigger, destroying any artifact and/or creature an opponent controls.
Resolve the Warbeast of Gorgoroth trigger, creating a 0/0 Orc Army creature token, and then putting two +1/+1 counters on it.
Activate Phyrexian Altar by sacrificing the Orc Army, adding {R}.
Repeat.

Infinite commander casts

Infinite storm count

The Balrog, Durin's Bane

Phyrexian Altar

Activate Altar of Dementia by sacrificing the creature with power four or greater.
The creature dies, triggering Warbeast of Gorgoroth twice, creating a 0/0 Army creature token if you don't control one, then putting four +1/+1 counters on an Army you control.
Resolve the Altar of Dementia ability, causing target player to mill cards equal to the sacrificed creature's power.
Repeat.

Infinite mill

Infinite self-mill

Altar of Dementia

Teysa Karlov

Combos with "Warbeast of Gorgoroth"