If Blue Ahri is defending and Retreat is cast, does her ability to give a unit -2 still resolve or does it have no effect?

Ruling: If Retreat is cast before Ahri's ability resolves, the ability resolves with 0 effect because Ahri is no longer 'Here' when the ability resolves. If Ahri's ability resolves first at start of showdown, then Retreat is cast with a separate chain, the -2 effect remains.

Sequence:

• If Retreat is cast before Ahri's ability resolves: Ahri leaves, then her ability resolves with 0 effect
• If Ahri's ability resolves first: The -2 is applied, then Retreat can be cast on a separate chain and the -2 remains

Nuances:

• Riftbound does not have fizzling; abilities resolve with 0 effect instead
• The word 'Here' is important - abilities that check if a unit is 'Here' will have 0 effect if that unit has left