Activate Viscera Seer by sacrificing Kithkin Spellduster.
When Kithkin Spellduster dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
Thran Vigil triggers, putting a +1/+1 counter on Kithkin Spellduster.
Resolve the Viscera Seer ability.
Repeat.

Infinite ETB

Infinite LTB

Infinite death triggers

Infinite sacrifice triggers

Infinite scry 1

Viscera Seer

Kithkin Spellduster

Thran Vigil

Activate Viscera Seer by sacrificing Kithkin Spellduster.
When Kithkin Spellduster dies, its persist ability triggers, returning it from your graveyard to the battlefield without a -1/-1 counter on it due to Vizier of Remedies.
Resolve the Viscera Seer ability
Repeat.

Vizier of Remedies

Activate Ashnod's Altar by sacrificing Kithkin Spellduster.
When Kithkin Spellduster dies, its persist ability triggers, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
Activate Ashnod's Altar by sacrificing Kithkin Spellduster.
When Kithkin Spellduster dies, its undying ability triggers, returning it from your graveyard to the battlefield with a +1/+1 counter on it.
Repeat.

Infinite colorless mana

Mikaeus, the Unhallowed

Ashnod's Altar

Activate Ashnod's Altar by sacrificing Kithkin Spellduster, adding {C}{C}.
Kithkin Spellduster dies, triggering its persist ability, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
Kithkin Spellduster enters the battlefield, triggering Denry Klin, putting a +1/+1 counter on Kithkin Spellduster.
Repeat.

Denry Klin, Editor in Chief

Activate Ashnod's Altar by sacrificing Kithkin Spellduster, adding {C}{C}.
Kithkin Spellduster dies, triggering its persist ability, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
Kithkin Spellduster enters the battlefield, triggering Intruder Alarm, untapping all creatures.
Activate Scholar of New Horizons by tapping it and removing the -1/-1 counter from Kithkin Spellduster, causing you to search your library for a Plains card and either put it onto the battlefield or put it into your hand.
Repeat.

Infinite mana creatures you control can produce

Infinite untap of creatures

Put all Plains cards from your libary into your hand

Infinite untap of creatures you control

Scholar of New Horizons

Intruder Alarm

Activate Phyrexian Altar by sacrificing Kithkin Spellduster, adding one mana of any color.
Kithkin Spellduster dies, triggering its persist ability, returning it from your graveyard to the battlefield with a -1/-1 counter on it.
Kithkin Spellduster enters the battlefield, triggering Intruder Alarm, untapping all creatures.
Activate Scholar of New Horizons by tapping it and removing the -1/-1 counter from Kithkin Spellduster, causing you to search your library for a Plains card and either put it onto the battlefield or put it into your hand.
Repeat.

Combos with "Kithkin Spellduster"