Infinite colorless mana, Infinite death triggers, Infinite ETB, Infinite LTB, Infinite sacrifice triggers
Activate Ashnod's Altar by sacrificing Defiant Greatmaw, adding
When Defiant Greatmaw dies, its undying ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
When Defiant Greatmaw enters the battlefield, its first ability triggers, putting two -1/-1 counters on it.
Defiant Greatmaw's second ability triggers, removing a -1/-1 counter from another creature you control.
Repeat.
Component Cards
How It Works
Activate Ashnod's Altar by sacrificing Defiant Greatmaw, adding
When Defiant Greatmaw dies, its undying ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
When Defiant Greatmaw enters the battlefield, its first ability triggers, putting two -1/-1 counters on it.
Defiant Greatmaw's second ability triggers, removing a -1/-1 counter from another creature you control.
Repeat.