Although your commander is a 7-drop, you can cast it very fast with mana rocks, as early as turns 2-3
If a non-Ritual Monster(s) is Normal or Special Summoned face-up (except during the Damage Step): You can Ritual Summon 1 LIGHT Ritual Monster (Warrior or Dragon) from your hand, by Tributing monsters from your hand or field whose total Levels equal or exceed the Level of that Ritual Monster, and if you do, it cannot be destroyed by battle

Amazon affiliate links Storage guide Inner sleeveVault X Exact Fit SleevesA snug perfect-fit inner layer double-sleeve valuable cards with these before the matte sleeve goes on.View on Amazon Outer sleeveDragon Shield Matte SleevesMatte, archival-safe outer sleeves the everyday standard for keeping surfaces and edges clean.View on Amazon Rigid holderCardboard Gold Top LoadersPSA-recommended acid-free top loaders rigid protection against bends and scratches on raw high-value cards.View on Amazon Premium binderDragon Shield Card Codex 360A 360-card side-loading portfolio with a padded cover for long-term, display-safe storage.View on Amazon Game data Type Pokmon Element Dragon Stage Basic HP 220 Rarity Ultra Rare Artist N-DESIGN Inc
The key difference with M-EX Pokmon is that they evolve from an -EX form
Being able to sacrifice a creature in response to anything will always be a powerful effect
Its such an easy way to guarantee value one, five, or ten years down the line