Activate Viscera Seer by sacrificing Persistent Specimen.
When Persistent Specimen dies, Pitiless Plunderer and Pawn of Ulamog trigger.
Resolve the Pitiless Plunderer trigger, creating a Treasure token.
Resolve the Pawn of Ulamog trigger, creating a creature token.
Resolve the Viscera Seer ability.
Activate the Treasure by tapping and sacrificing it, adding {B}.
Activate the creature token by sacrificing it, adding {C}.
When the creature token dies, Pitiless Plunderer triggers, creating a Treasure token.
Activate the Treasure by tapping and sacrificing it, adding {1}.
Activate Persistent Specimen by paying {2}{B}, returning it to the battlefield from your graveyard.
Repeat

Infinite LTB

Infinite ETB

Infinite sacrifice triggers

Infinite death triggers

Infinite scry 1

Pitiless Plunderer

Viscera Seer

Persistent Specimen

Pawn of Ulamog

Activate Ashnod's Altar by sacrificing Persistent Specimen, adding {C}{C}.
When Persistent Specimen dies, Bhaal triggers, putting a +1/+1 counter on Crystalline Crawler and goading it.
Activate Crystalline Crawler's first ability by removing a +1/+1 counter from it, adding {B}.
Activate Persistent Specimen by paying {2}{B}, returning it from your graveyard to the battlefield tapped.
Repeat.

Bhaal, Lord of Murder

Crystalline Crawler

Ashnod's Altar

Activate Phyrexian Altar by sacrificing Persistent Specimen, adding {B}.
When Persistent Specimen dies, Bhaal triggers, putting a +1/+1 counter on Cryptic Trilobite and goading it.
Activate Cryptic Trilobite by removing a +1/+1 counter from it, adding {C}{C} that can only be spent to activate abilities.
Activate Persistent Specimen by paying {2}{B}, returning it from your graveyard to the battlefield tapped.
Repeat.

Cryptic Trilobite

Phyrexian Altar

Activate Persistent Specimen by paying {2}{B}, returning it from your graveyard to the battlefield.
Activate Umbral Collar Zealot by sacrificing Persistent Specimen.
When Persistent Specimen is sacrificed, Szarel triggers, putting a number of +1/+1 counters equal to Szarel's power on Crystalline Crawler.
Resolve the Umbral Collar Zealot ability.
Activate Crystalline Crawler three times by removing three +1/+1 counters from it, adding {2}{B}.
Repeat.

Combos with "Persistent Specimen"