Overview:

This is a life-payment-focused combo deck built around K'rrik, Son of Yawgmoth, utilizing his ability to convert black mana costs into life payments to execute fast combo lines and generate massive card advantage, typically winning through Aetherflux Reservoir or massive life drain effects.

Primer:

The deck aims to leverage K'rrik's life-payment ability to cast spells efficiently and establish a strong card advantage engine. Ideal opening hands should contain fast mana (Sol Ring, Dark Ritual), card draw (Night's Whisper, Sign in Blood), and either tutors or combo pieces. The early game focuses on establishing K'rrik and card advantage engines while maintaining a healthy life total.

Mid-game transitions into assembling win conditions through tutors and life-payment synergies. Key decision points involve managing life total versus acceleration potential, and knowing when to go for the win. Primary lines include storming off with Aetherflux Reservoir, creating infinite mana/life loops with Blood Celebrant, or establishing a strong draw engine with Vilis, Broker of Blood or Necropotence. The deck can win as early as turn 4-5 with optimal draws but typically aims for turns 6-7.

Weaknesses:

The deck is heavily reliant on K'rrik and vulnerable to commander removal. Life payment strategies can be risky against aggressive decks or those with direct damage capabilities. The mono-black nature limits answers to certain permanent types, particularly enchantments, though Feed the Swarm provides some interaction. The deck can struggle against heavy counterspell strategies that prevent combo execution.

Most Important Cards:

1. Aetherflux Reservoir
2. Necropotence
3. Vilis, Broker of Blood
4. Dark Ritual
5. Blood Celebrant
6. Bolas's Citadel
7. Sol Ring
8. Entomb
9. Reanimate
10. Opposition Agent

Attribute Ratings:

• Speed: 7/10
• Resilience: 6/10
• Consistency: 8/10
• Interaction: 5/10

Rating Justification:

This deck operates at a solid 7.5 power level. It can consistently threaten wins around turns 4-5 with optimal draws, features multiple tutors and fast mana sources, and includes several powerful combo lines. While it lacks the consistency and protection of higher-powered decks, it's significantly stronger than casual builds. The deck's ability to convert life into resources and chain multiple spells in a single turn puts it firmly in the highly optimized category.

Final power level rating: 7.3 - 7.7

The deck shows strong optimization but falls short of true cEDH territory due to its vulnerability to interaction and reliance on the commander. It's positioned between focused competitive and highly optimized builds, capable of explosive turns but lacking the consistency and protection package of higher-powered decks.