Can you target the same unit with both instances of Falling Star (or Icathian Rain) to overkill it and avoid hitting another unit?

Ruling: Yes, you can target the same unit with both instances of Falling Star or Icathian Rain. Each ability can target any valid unit when it goes on the chain.

Sequence:

• Both instances of Falling Star target the same unit when placed on the chain
• The first instance resolves and kills the target
• The second instance resolves to no effect since its target is no longer valid

Nuances:

• This is a valid strategy to avoid triggering effects like Deathkneel on other units