When Arcane Shift is given Repeat by Temporal Portal, does it fully resolve (including the repeated effect) even though it banishes itself mid-resolution?

Ruling: Yes, Arcane Shift with Repeat fully resolves both instances of its effect even though it banishes itself during the first resolution. The spell executes all game instructions in their entirety before the chain state is examined again.

Sequence:

• Arcane Shift with Repeat begins resolving
• First instance: Deal 3 damage, then banish Arcane Shift
• The spell continues resolving despite being banished
• Second instance (Repeat): Deal 3 damage again (banish instruction does nothing as card is already banished)
• Resolution completes, then chain state is examined

Nuances:

• The card being banished mid-resolution does not stop the spell from continuing to resolve
• "Banish this" only preempts the normal "place in trash" step, it does not mean "stop resolving this"
• The spell must execute all game instructions in their entirety before play proceeds to an open state
• This would trigger effects like Ravenbloom Student that care about spells being played/resolved