yu gi oh deck tester Konami Yu-Gi-Oh Code of The Duelist Booster Box : Toys & Games Yu-Gi-Oh! Deck Challenge: 3 Charmer

Transmodify lets you upgrade a monster into a new monster from your Deck thats the same Type and Attribute, but 1 Level higher

For the most part it's only made a major impact in Limited, but there still have been a few nice other battles that have made Constructed like Invasion of Gobakhan // Lightshield Array, Invasion of Tarkir // Defiant Thundermaw, and Invasion of Amonkhet // Lazotep Convert

Celebrate your crossover adventures with exclusive items, including a foil promo card and an oversized D20

Its not a stretch to call Heliods Pilgrim the Stoneforge Mystic of limited

However, the user then pulls a Secret Rare Mew card that was not previously announced