Can Irelia's Legend ability be used multiple times per turn with only a single target, or does each use require meeting the trigger condition again?

Ruling: Irelia's ability is a triggered ability that activates when you target a friendly unit. To use the ability multiple times in a turn, you must meet the trigger condition (targeting a unit) each time.

Sequence:

• Target a friendly unit with a spell or ability
• Irelia's triggered ability can be used
• To use Irelia's ability again, you must target a unit again

Nuances:

• Simply readying Irelia (such as by paying energy after conquering a battlefield) does not allow you to reuse her ability without meeting the trigger condition again