What it does
I can't find "Spiritual Leader" as an official Magic: The Gathering keyword or ability—it doesn't correspond to any printed keyword, ability word, or named mechanic in the game. It's possible you're thinking of a specific card name, a creature type/role flavor, or perhaps a misremembered term.
A few things it might be confused with: Soulbond (pairing creatures for shared abilities), Mentor (putting +1/+1 counters on lesser-power attackers), or a creature with "Cleric" or "Advisor" typing that buffs a tribe. There's also no "Leader" keyword, though Commander itself revolves around your commander as the deck's "leader."
If you can share the exact card or where you saw this term, I'll give you a precise rules breakdown—including any Commander-specific nuances like command zone interactions or color identity. Otherwise, double-check the card's Oracle text via Gatherer or Scryfall.
Iconic cards with Spiritual Leader
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