Activate Death Cultist by sacrificing it, returning it from the battlefield to your hand due to Necromancer Magemark's replacement effect.
Put Glistening Oil into your graveyard, triggering itself, returning it from your graveyard to your hand.
Resolve Death Cultist's ability, causing target player to lose 1 life and you to gain 1 life.
Cast Death Cultist by paying {B/P}.
Aetherflux Reservoir and K'rrik each trigger.
Resolve K'rrik's trigger, putting a +1/+1 counter on it.
Resolve Aetherflux Reservoir's trigger, gaining 1 life for each spell you've cast this turn.
Cast Glistening Oil targeting Death Cultist by paying {B/P}{B/P}.
Aetherflux Reservoir and K'rrik each trigger.
Resolve K'rrik's trigger, putting a +1/+1 counter on it.
Resolve Aetherflux Reservoir's trigger, gaining 1 life for each spell you've cast this turn.
Repeat.

Infinite +1/+1 counters on a creature

Infinite damage

Infinite creature ETB

Infinite lifegain

Infinite lifegain triggers

Infinite lifeloss

Infinite creature LTB

Infinite creature sacrifice triggers

K'rrik, Son of Yawgmoth

Necromancer's Magemark

Glistening Oil

Death Cultist

Aetherflux Reservoir

Cast Spiteful Hexmage by paying {B}.
When Spiteful Hexmage enters the battlefield, it triggers, creating a Cursed Role token attached to it.
Activate Phyrexian Altar by sacrificing Spiteful Hexmage, adding {B}.
Spiteful Hexmage is returned to your hand instead of being put into your graveyard due to Necromancer's Magemark.
Repeat.

Infinite storm count

Spiteful Hexmage

Phyrexian Altar

Cast Charming Scoundrel by paying {2}.
When Charming Scoundrel enters the battlefield, it triggers, creating a Wicked Role token attached to it.
Activate Ashnod's Altar by sacrificing Charming Scoundrel, adding {2}.
Charming Scoundrel is returned to your hand instead of being put into your graveyard due to Necromancer's Magemark.
The Wicked Role token that was attached to Charming Scoundrel triggers, causing each opponent to lose 1 life.
Repeat.

Charming Scoundrel

Ashnod's Altar

Mycosynth Lattice

Infinite card draw

Infinite colored mana

Infinite colorless mana

Infinite draw triggers

Chromatic Orrery

Cast Charming Scoundrel either from your hand or from the top of your library by paying {2}.
When Charming Scoundrel enters the battlefield, it triggers, creating a Wicked Role token attached to it.
Activate Ashnod's Altar by sacrificing Charming Scoundrel, adding {2}.
Charming Scoundrel is returned to your hand instead of being put into your graveyard due to Necromancer's Magemark.
The Wicked Role token that was attached to Charming Scoundrel triggers, causing each opponent to lose 1 life.
Repeat.

Vizier of the Menagerie

Combos with "Necromancer's Magemark"