For Ash, Party Crasher, this bonus is simply putting a +1/+1 counter on the card
Shelob, Child of Ungoliant is one of the most hyped new legends from the new Lord of the Rings set and a Fog that makes Spiders is perfect for the deck
Scientists Aang and La, Ocean's Fury Aang, A Lot to Learn Aang, Airbending Master Aatchik, Emerald Radian Abandoned Air Temple Aberrant Return Abigale, Eloquent First-Year Abigale, Poet Laureate Abjure Abomination, Terrifying Titan Aboroth Absorb Absorb Energy Abstract Iguanart Abstruse Interference Abzan Advantage Abzan Ascendancy Abzan Battle Priest Abzan Falconer Academy Elite Access Denied Accomplished Automaton Ace, Fearless Rebel Acid-Spewer Dragon Acolyte of the Inferno Acornelia, Fashionable Filcher Acrobatic Cheerleader Action News Crew Adaptive Gemguard Adaptive Snapjaw Adaptive Sporesinger Adaptive Training Post Adder-Staff Boggart Additive Evolution Adherent of Hope Admiral Brass, Unsinkable Admiral's Order Adorned Crocodile Adrenaline Jockey Adric, Mathematical Genius Adrix and Nev, Twincasters Adventurous Eater Advocate of the Beast Aegis Sculptor Aegis of the Legion Aeon Chronicler Aerie Auxiliary Aerie Bowmasters Aerie Ouphes Aerith Gainsborough Aerith Rescue Mission Aeromunculus Aeronaut Cavalry Aether Hub Aether Spike Aether Vial Aetheric Amplifier Aetherstorm Roc Aetherstream Leopard Aetherwind Basker Aetherworks Marvel Aeve, Progenitor Ooze Afiya Grove Agatha's Soul Cauldron Age of Ultron Agent Bishop, Man in Black Agent Frank Horrigan Agent Maria Hill Agent Phil Coulson
If you can do that in Limited, the potential in a constructed format like EDH is even higher
Thats just so many abilities
This is probably the new best Commander for a Changeling deck, edging out Morophon in many cases
