Can Azir activate his once-per-turn ability twice when equipped with Svellsongur?

Ruling: Yes, Azir can use his ability twice per turn when equipped with Svellsongur. Svellsongur copies the full effect text onto Azir, giving him the ability twice - once from his original text and once from Svellsongur's copied text. Each instance can be used once per turn.

Sequence:

• Azir has his original ability with "once per turn" restriction
• Svellsongur grants Azir a copy of his ability text (including the "once per turn" restriction)
• Azir now has two separate instances of the same ability
• Each instance can be activated once per turn, allowing two total activations

Nuances:

• If Svellsongur is unequipped and re-equipped to Azir in the same turn, it creates a new separate ability instance that could be used a third time
• The copied ability only exists while Svellsongur remains equipped to Azir
• Complex sequences involving multiple Azirs and Svellsongurs were discussed but become impractical