Activate Ashnod's Altar Altar by sacrificing Inga, adding {C}{C}.
When Inga dies, it's second ability and Nim Deathmantle trigger.
Resolve the Inga trigger, causing you to draw three cards.
Activate Mind over Matter by discarding a card, untapping a mana-producing permanent.
Activate the mana-producing permanent by tapping it, adding at least {1}.
Repeat steps 4 and 5 one additional time.
Resolve the Nim Deathmantle trigger from step 2, causing you to pay {4} to return Inga from your graveyard to the battlefield, and attach Nim Deathmantle to it.
When Inga enters the battlefield, its first ability triggers, causing you to scry 3.
Repeat.

Near-infinite card draw

Near-infinite death triggers

Near-infinite ETB

Near-infinite looting

Near-infinite LTB

Near-infinite sacrifice triggers

Near-infinite self-discard triggers

Infinite draw triggers

Inga Rune-Eyes

Nim Deathmantle

Mind Over Matter

Ashnod's Altar

Activate Phyrexian Altar by sacrificing Inga, adding {1}.
When Inga dies, it's second ability and Nim Deathmantle trigger.
Resolve the Inga trigger, causing you to draw three cards.
Activate Mind over Matter by discarding a card, untapping a mana-producing permanent.
Activate the mana-producing permanent by tapping it, adding at least {1}.
Repeat steps 4 and 5 two additional times.
Resolve the Nim Deathmantle trigger from step 2, causing you to pay {4} to return Inga from your graveyard to the battlefield, and attach Nim Deathmantle to it.
When Inga enters the battlefield, its first ability triggers, causing you to scry 3.
Repeat.

Infinite looting

Infinite self-discard triggers

Phyrexian Altar

Activate Ashnod's Altar Altar by sacrificing Inga, adding {C}{C}.
When Inga dies, it's second ability and Nim Deathmantle trigger.
Resolve the Inga trigger, causing you to draw three cards.
Activate Skirge Familiar twice by discarding two cards, adding {B}{B}.
Resolve the Nim Deathmantle trigger from step 2, causing you to pay {4} to return Inga from your graveyard to the battlefield, and attach Nim Deathmantle to it.
When Inga enters the battlefield, its first ability triggers, causing you to scry 3.
Repeat.

Skirge Familiar

Activate Phyrexian Altar by sacrificing Inga, adding {1}.
When Inga dies, it's second ability and Nim Deathmantle trigger.
Resolve the Inga trigger, causing you to draw three cards.
Activate Skirge Familiar three times by discarding three cards, adding {B}{B}{B}.
Resolve the Nim Deathmantle trigger from step 2, causing you to pay {4} to return Inga from your graveyard to the battlefield, and attach Nim Deathmantle to it.
When Inga enters the battlefield, its first ability triggers, causing you to scry 3.
Repeat.

Combos with "Inga Rune-Eyes"