Overview:

This mono-green Omnath, Locus of Mana deck focuses on explosive mana generation and commander-centric strategies. Omnath serves as both a mana battery and a massive threat, growing with stored green mana while enabling combos through its synergies. The deck leverages land ramp, creature-based mana dorks, and multiplicative effects like Nyxbloom Ancient/Mana Reflection to generate obscene amounts of mana. Primary win conditions include commander damage via an unblockable Omnath, infinite mana combos with Selvala, Heart of the Wilds/Staff of Domination, and alternate outlets like Altar of Dementia or Surestrike Trident. Ashaya, Soul of the Wild and Seedborn Muse create unique synergies, while The Great Henge and Sylvan Library provide critical card advantage.

Primer:

Core Strategy Execution:

1. Early Ramp (T1-3): Deploy 1-mana dorks (Llanowar Elves, Arbor Elf), land enchantments (Wild Growth), or land-based ramp (Nature's Lore). Use Azusa, Lost but Seeking or Oracle of Mul Daya for extra land drops.
2. Mana Multiplication (T3-5): Resolve key enablers like Nykthos, Shrine to Nyx, Karametra's Acolyte, or Doubling Cube. Seedborn Muse + Wilderness Reclamation enables explosive mana storage with Omnath.
3. Win Conditions (T5-7):
   • Commander Damage: Equip Omnath with Whispersilk Cloak/Trailblazer's Boots for evasion. Use Tyvar's Stand for lethal.
   • Infinite Mana: Selvala, Heart of the Wilds + Staff of Domination with Omnath's power (or another creature ≥5 power). Use infinite mana with Altar of Dementia for mill or Surestrike Trident for direct damage.
   • Overwhelming Value: Nyxbloom Ancient or Mana Reflection enables massive X-spells like Primordial Hydra or Traverse the Outlands.

Mulligan Priorities:

• Keep hands with 2-3 lands (including green sources) and 1-2 ramp pieces.
• Prioritize Sol Ring, early dorks, or Utopia Sprawl for explosive starts.
• Look for key combo pieces (Selvala, Staff) if protection (Lightning Greaves, Heroic Intervention) is present.

Key Tips:

• Use Ashaya, Soul of the Wild to turn creatures into Forests, synergizing with Arbor Elf and Nykthos, Shrine to Nyx.
• Vedalken Orrery enables flash for surprise blockers or Yeva, Nature's Herald-like effects.
• Nim Deathmantle protects key creatures and pairs with Altar of Dementia for recursive mill.

Weaknesses:

Critical

• Extreme vulnerability to board wipes (loses mana dorks, Omnath's stored mana, and key creatures).
• Cursed Totem/Linvala, Keeper of Silence shuts down mana dorks, Selvala, and Karametra's Acolyte.
• Relies heavily on commander presence for mana storage; repeated removal resets progress.

Moderate

• Limited stack interaction (no counterspells) struggles against combo decks.
• Blood Moon/Back to Basics disrupts nonbasic mana (Nykthos, Reliquary Tower).
• Graveyard hate (Rest in Peace) neuters Nim Deathmantle/Altar of Dementia.

Minor

• Flyers can chump Omnath without Shadowspear or Rancor.
• Low instant-speed interaction outside combat tricks like Ram Through.

Most Important Cards:

• Omnath, Locus of Mana (Mana battery/wincon)
• Selvala, Heart of the Wilds (Combo enabler)
• Staff of Domination (Infinite mana outlet)
• Nykthos, Shrine to Nyx (Mana multiplier)
• Seedborn Muse (Untap synergy)
• The Great Henge (Card advantage engine)
• Ashaya, Soul of the Wild (Land synergy)
• Heroic Intervention (Protection)
• Altar of Dementia (Combo finisher)
• Nim Deathmantle (Recursion)

Attribute Ratings:

Speed: 6/10
Can generate infinite mana or lethal commander damage by T6-7 in ideal conditions, but lacks turbo elements like fast tutors or free counters to protect early combos.

Resilience: 5/10
Moderate protection for Omnath and key pieces, but folds to repeated removal/wipes and has limited recovery from graveyard hate.

Consistency: 7/10
Strong ramp and card draw (Sylvan Library, Beast Whisperer) ensure steady access to resources, though combo pieces lack redundancy.

Interaction: 4/10
Relies on targeted removal (Beast Within, Krosan Grip) and combat tricks; no stack interaction beyond protection spells.

Rating Justification:

This deck demonstrates focused combo potential and strong mana acceleration, capable of T6-7 wins, but its reliance on vulnerable creature-based strategies and lack of interaction cap its competitiveness. Resilience issues place it below optimized tiers.

Power level: 6.0 - 6.5