Overview:

This mono-green deck is built around Ghalta, Primal Hunger, leveraging high-power creatures and explosive ramp to reduce Ghalta's cost to {G}{G} as early as turn 3-4. The primary strategy involves deploying massive threats like Craterhoof Behemoth, Zopandrel, Hunger Dominus, and Ghalta, Stampede Tyrant to overwhelm opponents through combat, amplified by overrun effects like Triumph of the Hordes and Pathbreaker Ibex. A secondary infinite mana combo with Selvala, Heart of the Wilds and Staff of Domination enables wins via card-draw engines or Finale of Devastation. Ghalta serves as both a cost-reduced beater and a card-draw enabler, while the deck maintains momentum through potent card advantage and creature tutors.

Primer:

Core Strategy Execution:

1. Explosive Start (Turns 1-3): Prioritize 1-mana dorks (Llanowar Elves, Elvish Mystic, Fyndhorn Elves) and fast mana (Sol Ring, Mox Diamond). Follow with 2-3 mana accelerants like Priest of Titania, Circle of Dreams Druid, or Karametra's Acolyte.
2. Board Development (Turns 2-5): Deploy high-power enablers (Steel Leaf Champion, Rhonas the Indomitable, Goreclaw, Terror of Qal Sisma) to reduce Ghalta's cost. Activate card engines like The Great Henge, Beast Whisperer, or Tribute to the World Tree to refill.
3. Threat Deployment (Turns 3-6): Cast Ghalta for {G}{G} or cheat threats via Ghalta, Stampede Tyrant. Tutor finishers (Craterhoof Behemoth, Pathbreaker Ibex) or combo pieces (Selvala + Staff) using Finale of Devastation, Green Sun's Zenith, or Worldly Tutor.
4. Win Execution (Turns 4-7):
   • Combat: Swing with 20+ power boards enhanced by Unnatural Growth, Triumph of the Hordes, or a massive Finale of Devastation (X≥10).
   • Combo: Generate infinite mana with Selvala, Heart of the Wilds + Staff of Domination + a creature with power ≥5. Draw the deck via The Great Henge/Rishkar's Expertise and win with combat or Walking Ballista (assumed inclusion via Urza's Saga).

Mulligan Priorities:

• Keep hands with ≥2 lands (including green sources) and ≥2 ramp pieces (e.g., dork + Sol Ring).
• Prioritize hands containing a high-power creature (e.g., Steel Leaf Champion) or a card-draw engine (Sylvan Library, The Great Henge).
• Reject hands lacking early ramp or clogged with ≥3 high-CMC spells.

Key Tips:

• Ghalta Synergy: Sacrifice Ghalta to Greater Good to draw 12 cards, or use Rogue's Passage for commander damage kills.
• Combo Protection: Shield Selvala/Staff with Lightning Greaves, Heroic Intervention, or Allosaurus Shepherd against counterspells.
• Mana Explosions: Maximize Nykthos, Shrine to Nyx with devotion from high-power creatures. Ashaya, Soul of the Wild turns dorks into Forests for Arbor Elf untaps.
• Recovery: Recur key pieces with Eternal Witness or Turntimber Symbiosis. Use The Skullspore Nexus to rebuild after wipes.

Weaknesses:

Critical

• Board wipes cripple the creature-dependent ramp and cost-reduction engine, requiring significant resources to rebuild.
• Cursed Totem/Linvala, Keeper of Silence shuts down mana dorks, Selvala, Staff of Domination, and other activated abilities.
• Torpor Orb nullifies ETB value from Craterhoof, Eternal Witness, and draw triggers (The Great Henge, Tribute to the World Tree).

Moderate

• Artifact/enchantment removal (e.g., Nature's Claim) disrupts key engines like The Great Henge, Staff of Domination, and Skullspore Nexus.
• Graveyard hate (e.g., Rest in Peace) hinders recursion from Eternal Witness and Finale of Devastation.
• Rule of Law effects limit the deck's ability to chain multiple spells per turn.

Minor

• Flyer-heavy decks can stall combat without trample enablers (though many creatures have it).
• Spot removal on mana dorks slows the deck but is mitigated by redundancy.

Most Important Cards:

• Selvala, Heart of the Wilds (Combo engine, explosive ramp)
• The Great Henge (Card draw, cost reduction, +1/+1 counters)
• Craterhoof Behemoth (Primary combat finisher)
• Staff of Domination (Combo piece, infinite mana outlet)
• Finale of Devastation (Tutor, win condition, board pump)
• Ghalta, Stampede Tyrant (Alternate win enabler, cheats creatures)
• Nykthos, Shrine to Nyx (Devotion-based mana explosion)
• The Skullspore Nexus (Recovery, token generation, power doubling)
• Sylvan Library (Card selection, early advantage)
• Unnatural Growth (Combat damage amplifier)

Attribute Ratings:

Speed: 8/10

• Capable of T4 wins via Selvala/Staff combo or T5-6 combat kills with Craterhoof/Finale, fueled by hyper-efficient ramp.

Resilience: 6/10

• Recursion (Eternal Witness), protection (Heroic Intervention), and card draw mitigate setbacks, but heavy reliance on board presence creates vulnerability to wipes/stax.

Consistency: 8/10

• 12+ mana dorks, 7+ tutors, and 10+ card-draw engines ensure reliable access to combo pieces and finishers.

Interaction: 5/10

• Targeted removal (Beast Within, Kogla, the Titan Ape, Ram Through) handles threats, but minimal stack interaction beyond Allosaurus Shepherd leaves combos exposed.

Rating Justification:

This deck operates at high-power levels with T4-5 win potential through efficient ramp and combos, aligning with the "Focused Competitive" tier. However, vulnerabilities to board wipes and stax pieces cap its resilience, preventing it from reaching cEDH viability.

Power level: 7.5 - 8.0