Rule · Chapter 1
cr:1.5.1
A macro is a non-card object in the arena.
Example: Sanctuary of Aria is a macro with the text “Instant – {r}{r}: Prevent the next 1 damage that would be dealt to you this turn by a source of your choice. Destroy this at the beginning of the end phase.”
Note: A macro is not a card, even if it is represented by an official Flesh and Blood card. Macros are determined by tournament rules for specific formats.