- ↑ 1.0 1.1 Konami Gameplay FAQ: Crimson Crisis -- Card Rulings (version 2.0)
- ↑ Konami FAQ: Trap Card > Spirit Force
- ↑ 3.0 3.1 Konami FAQ: Does the effect of "Spirit Force" which adds one Tuner Monster to your hand target?
- ↑ Konami FAQ: Can "Spirit Force" be activated when there are no Warrior-Type Tuner Monsters in your Graveyard?
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