Does Pit Rookie's 'it' in the reminder text refer to Pit Rookie itself or to the card being buffed?

Ruling: The "it" refers to the card you buff (the "another friendly unit"), not Pit Rookie itself. You only buff the targeted card, not Pit Rookie.

Nuances:

• Reminder text in brackets has no actual ruling implications and can sometimes be worded poorly
• "It" always refers to other cards in Riftbound
• Cards refer to themselves in first person (e.g., "I get +1")