I'll analyze the winrate difference between mainboard and sideboard Teferi in Goryo's Vengeance decks. Let me start by finding the archetype and card details, then examine the performance data.
Let me search more specifically for common Teferi cards used in Modern:
Now let me check which Teferi is actually played in Goryo's Reanimator decks by looking at recent card usage:
Great! Now I can see that Teferi, Time Raveler is played in both mainboard (30.83% of decks) and sideboard (71.43% of decks) in Goryo's Reanimator. Now I need to analyze the performance difference between decks that play Teferi mainboard vs sideboard using a custom query:
Let me also get some comparison data for decks that don't run Teferi at all:
Now let me get the sources for this analysis:
Based on my analysis of Goryo's Reanimator tournament data from the last 60 days, there's a significant winrate difference of +10.03% in favor of sideboard Teferi:
Sideboard Teferi: 56.70% winrate (127-97 record, 54 entries)
Mainboard Teferi: 46.67% winrate (63-72 record, 41 entries)
No Teferi: 46.91% winrate (76-86 record, 38 entries)
• Sideboard positioning is optimal - Decks running Teferi in the sideboard significantly outperformed those with mainboard copies (+10.03% winrate difference)
• Mainboard Teferi underperforms - Actually performs slightly worse than decks without Teferi at all (-0.24% difference)
• Usage patterns support this - 71% of Goryo's decks run Teferi in sideboard vs only 31% mainboard, suggesting the community has identified the optimal placement
• Sample size confidence - Analysis covers 133 tournament entries across 71 tournaments over 60 days
This suggests Teferi, Time Raveler is more effective as a situational sideboard card in Goryo's Reanimator, likely brought in against specific matchups where the static ability and tempo plays matter most, rather than as a maindeck inclusion.
Sources: Data from 71 tournaments: 88.7% MTGO, 11.3% Melee. Recent examples: https://www.mtgo.com/decklist/modern-challenge-32-2025-09-2112815144, https://www.mtgo.com/decklist/modern-challenge-64-2025-09-2012815138, https://www.mtgo.com/decklist/modern-challenge-32-2025-09-2012815133