I'll analyze the winrate of Modern Affinity decks running 4 Thought Monitor and 4 Thoughtcast based on their artifact land count.
Now I need to identify artifact lands and analyze the winrates of Affinity decks based on their artifact land counts. Let me search for common artifact lands in Modern:
Now let me query the database to find Affinity decks with exactly 4 Thought Monitor and 4 Thoughtcast, and analyze their winrates based on artifact land counts:
The query shows that all Affinity decks with 4 Thought Monitor and 4 Thoughtcast have null artifact land counts, which suggests they're not running the traditional artifact lands. Let me check what lands these decks are actually running:
I can see that these Modern Affinity builds are using artifact lands like Darksteel Citadel, Razortide Bridge, Silverbluff Bridge, and Mistvault Bridge rather than the traditional artifact lands. Let me analyze the winrates based on total artifact land counts (including bridges and citadels):
This result seems incorrect - the numbers are too high. Let me fix the query to properly count artifact lands per deck:
Now let me get sources to provide tournament data for this analysis:
Based on the analysis of Modern Affinity decks running exactly 4 Thought Monitor and 4 Thoughtcast, decks with 2 artifact lands achieve the highest winrate at 59.7%. This configuration was played by 16 decks with a strong 46-31-9 match record.
The data shows clear performance tiers: 2 artifact lands (59.7% winrate) significantly outperforms all other configurations. Decks with 5 artifact lands achieve 50.6% winrate (21 decks), while 4 artifact lands reach 48.7% (46 decks). Configurations with 0, 7, or 8+ artifact lands perform poorly, with winrates between 32.7-43.2%.
The optimal 2 artifact land count likely provides enough artifact density for affinity cost reduction while maintaining manabase consistency. Higher counts may dilute the manabase without proportional benefit, while lower counts reduce synergy effectiveness.
Sources: Data from 72 tournaments (86.1% MTGO, 13.9% Melee) including recent events.
https://www.mtgo.com/decklist/modern-challenge-32-2025-09-1512814298
https://www.mtgo.com/decklist/modern-showcase-challenge-2025-09-1412814234
https://www.mtgo.com/decklist/modern-challenge-32-2025-09-1412814287