When Svellsongur is attached to Aphelios-Exalted, does it bypass the restriction of choosing each ability only once per turn, effectively allowing you to use each mode twice?

Ruling: Yes, when Svellsongur is attached to Aphelios-Exalted, Aphelios has two instances of his ability (one printed, one copied). Each instance has its own set of mode choices, effectively allowing you to use each mode twice per turn.

Sequence:

• Svellsongur copies Aphelios's printed text as it attaches
• This creates two separate abilities on Aphelios
• Each ability triggers independently when Svellsongur attaches
• Each ability has its own restriction on choosing modes once
• You can select the same mode from each ability instance

Nuances:

• The copied text becomes active during the attachment process because it's a triggered ability that triggers off of attaching
• You're not bypassing the "once per turn" restriction; rather, you have two separate abilities each with their own restriction
• This allows effects like channeling 2 or readying 4 runes