yugioh gilford the legend deck (SD5-EN001) [Structure Deck: Warrior's Triumph] may be 1st or Unlimited Edition Gilford the Phoenix King by

It is a Colorless card illustrated by Narumi Sato

PSE Prismatic Secret Rare Exosister Mikailis X LIGHT Rank 4 [ WarriorXyzEffect ] ATK 2500 DEF 1800 2 Level 4 monsters Cannot be destroyed by battle with a monster Special Summoned from the GY

On a negative note, Skarmory is indeed a Mega Evolution, which comes with the clear risk of giving a lot of advantage to your opponent if it falls in battle, so that is the entire reason why I didnt dare include it higher on the list

Gavi, Nest Warden is the perfect commander for this deck she reduces the cost of cycling one card per turn, and she synergizes with the draw your second card cards from Throne of Eldraine