Aetherflux Reservoir, Death Cultist, Glistening Oil, K'rrik, Son of Yawgmoth, and Necromancer's Magemark

Prerequisites

• Aetherflux Reservoir on the battlefield
• Death Cultist on the battlefield
• Glistening Oil on the battlefield
• K'rrik, Son of Yawgmoth on the battlefield
• Necromancer's Magemark on the battlefield
• Glistening Oil attached to Death Cultist
• Necromancer's Magemark attached to any other creature
• You have at least 5 life

Steps

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

Results

• Infinite +1/+1 counters on K'rrik
• Infinite damage
• Infinite ETB
• Infinite lifegain
• Infinite lifegain triggers
• Infinite lifeloss
• Infinite LTB
• Infinite sacrifice triggers