Can Lee Sin gain a second buff from a card that states 'if it doesn't have a buff, it gets a buff'?

Ruling: Yes, Lee Sin can gain a second buff from such cards. Lee Sin's card text allows it to break the normal rules of the Buff mechanic and gain more than one buff.

Nuances:

• Text in italics between brackets is reminder text and doesn't hold value in itself; it only reminds you of other rules or mechanics
• The reminder text about buff counters describes the normal mechanic, but Lee Sin is an exception to this rule