Grixis gives you Blue for counters and card flow, Black for removal and the +1/+1 counters matter size of Abzan, and then Red gives you burn and artifact removal
Its honestly a blue players dream: plenty of counterspells, lots of card draw per turn cycle As the pace-setter, everybody immediately looks to you for permission whenever trying to cast something big
We tested the fit using KMC Hyper Mat outer sleeves and their respective perfect fit inner sleeves
The front side of this Commander is fine, it generates mana for noncreature spells, but the backside is where the main strategy reveals itself

Mono-Blue Counterspell Deck Creature (10) 1x Brine Seer 1x Daring Apprentice 1x Draining Whelk 1x Kheru Spellsnatcher 1x Lullmage Mentor 1x Realmwright 1x Stronghold Biologist 1x Stronghold Machinist 1x Voidmage Apprentice 1x Wall of Frost Land (37) Enchantment (1) Artifact (3) Instant (48) 1x Abjure 1x Annul 1x Arcane Denial 1x Bone to Ash 1x Cancel 1x Circular Logic 1x Contradict 1x Controvert 1x Countermand 1x Counterspell 1x Delay 1x Deprive 1x Discombobulate 1x Disdainful Stroke 1x Dismal Failure 1x Dismiss 1x Dissipate 1x Dissolve 1x Dream Fracture 1x Essence Scatter 1x Exclude 1x Faerie Trickery 1x False Summoning 1x Familiar's Ruse 1x Fervent Denial 1x Foil 1x Fuel for the Cause 1x Geist Snatch 1x Horribly Awry 1x Last Word 1x Lay Bare 1x Logic Knot 1x Lost in the Mist 1x Mystic Denial 1x Negate 1x Nullify 1x Overwhelming Intellect 1x Preemptive Strike 1x Psychic Barrier 1x Put Away 1x Remove Soul 1x Rewind 1x Scatter Arc 1x Second Guess 1x Spell Blast 1x Stoic Rebuttal 1x Summoner's Bane 1x Vex

Unfortunately the creatures starts as a 1/1