Does a "when I attack" effect resolve if the attacking unit is killed by a reaction before combat?

Ruling: If a unit with a "when I attack" effect is killed by a reaction before combat, the effect still resolves unless it requires the unit to be in a specific location (uses "here").

Nuances:

• Effects that target or reference "here" will fail if the unit is removed from that location before resolution (e.g., Twisted Fate's red ability)
• Effects that don't require the unit to be in a specific location will still work (e.g., Twisted Fate's blue or yellow abilities)
• Actions cannot interrupt attack triggers since they can't be played during that timing window