For Fortified Position battlefield ('when you defend here, choose a unit. It gets shield 2 this combat'), does the shield trigger resolve before 'When I attack' abilities, potentially saving defending units from attack-triggered damage?

Question

Accepted Answer

Ruling: 'When I attack' triggers are placed on the stack first but resolve last. The battlefield's 'when you defend' trigger resolves first, giving shield 2 to a chosen unit before 'When I attack' abilities resolve.

Sequence:
- Combat is initiated
- 'When I attack' triggers go on stack
- 'When you defend' triggers go on stack (on top)
- 'When you defend' resolves first, granting shield 2
- 'When I attack' resolves last

Nuances:
- You can choose any unit (including enemy units) for the shield effect
- Abilities with 'while' (like static modifiers) are intrinsic and always active, not triggered abilities that use the stack