Mikaeus, the Unhallowed, Bloodied Ghost, and Altar of Dementia Combo

Mikaeus, the Unhallowed, Bloodied Ghost, and Altar of Dementia

Here's how the cards Mikaeus, the Unhallowed, Bloodied Ghost, and Altar of Dementia results in Infinite LTB, Infinite ETB, Infinite sacrifice triggers, Infinite death triggers, Infinite mill, and Infinite self-mill

Mikaeus, the Unhallowed

Bloodied Ghost

Altar of Dementia

Prerequisites

Mikaeus, the Unhallowed on the battlefield
Bloodied Ghost on the battlefield
Altar of Dementia on the battlefield

Steps

Activate Altar of Dementia by sacrifiicing Bloodied Ghost
When Bloodied Ghost dies, its undying ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it
When it enters, Bloodied Ghost will put a -1/-1 counter on itself, removing the +1/+1 counter
Resolve the Altar of Dementia ability
Repeat