It doesn't have to be attacking the same player, planeswalker, or battle that Shaun is attacking
The difference of my cards is very easy to tell
Arbor Adherent can provided mana to play your bomb cards like Craterhoof Behemoth, Walking Ballista, or Smuggler's Surprise way ahead of schedule
If you peek through past gold sets, you'll notice this is a well we keep going back to, mostly out of necessity

Synthoids Aang and La, Ocean's Fury Aang's Iceberg Aang's Journey Aang, Destined Savior Aang, Master of Elements Aang, Swift Savior Aang, at the Crossroads Aang, the Last Airbender Aatchik, Emerald Radian Abandon Attachments Abandoned Air Temple Abandoned Campground Aberrant Manawurm Abhorrent Oculus Abigale, Eloquent First-Year Abigale, Poet Laureate Abomination, Terrifying Titan Abrade Abraded Bluffs Absolute Virtue Absolving Lammasu Absorbing Man Abstract Paintmage Abuelo, Ancestral Echo Abyssal Gorestalker Abyssal Harvester Abzan Devotee Abzan Monument Accumulate Wisdom Aclazotz, Deepest Betrayal Acolyte of Aclazotz Acrobatic Cheerleader Acrobatic Leap Action News Crew Adagia, Windswept Bastion Adamant Will Adaptive Automaton Adaptive Gemguard Additive Evolution Adelbert Steiner Ademi of the Silkchutes Adept Watershaper Adorned Crocodile Adrenaline Jockey Adventurer's Airship Adventurer's Inn Adventuring Gear Adventurous Eater Aegis Sculptor Aegis Turtle Aerial Doombot Aerith Gainsborough Aerith Rescue Mission Aether Syphon Aetherize Aetherjacket Aettir and Priwen Affectionate Indrik Afterburner Expert Aftermath Analyst Agate Assault Agate-Blade Assassin Agatha of the Vile Cauldron Agatha's Champion
