Although the Adamantoise's 20 toughness in Magic: The Gathering is a far cry from its five million health points in FF15 , it is still very formidable
Perhaps his last moment of cultural relevance was back in the 90s, with TV series Goof Troop (and its accompanying SNES title, which was, somewhat improbably, the brainchild of Resident Evil creator Shinji Mikami!)
Also note that removing Gatta and Luzzu eliminates the 3-card infinite combo with Walking Ballista and Hardened Scales-type effects
That would be really lame in the current meta
Id also replace some of the non-colored ramp for colored ramp instead and/or increase the amount of fixing by 2 to 3 cards
Green-White Green Kami of Whispered Hopes Ozolith, the Shattered Spire Forgotten Ancient Quilled Greatwurm Rishkar, Peema Renegade White With those understood, what else is there