Bard's Unique Eternals include one titled Cosmic Catches with a requirement of "Multiple (2+) enemy champions stunned with Cosmic Binding (Q)".
I was always under the impression that Bard has only ever been able to stun a maximum of 2 people, not 2+ with a single cast of his Q. So, is there ever a situation where Bard could technically stun more than 2 enemy champions at a time with a single cast?