While both are cool full art cards, seeing Mewtwo hover menacingly above a city makes for an awe-inspiring new addition to any deck
Garland, Knight of Cornelia / Chaos, the Endless Rating: 6/10 Garland, Knight of Cornelia isnt broken by any means, but in a spells deck there are few better turn 2 plays
Passionate Archaeologist Passionate Archaeologist is best as a background for a Durnan of the Yawning Portal deck or in the 99 of popular play from exile commanders like Laelia, the Blade Reforged and Faldorn, Dread Wolf Herald
Example Decklist: Yorion Death And Taxes | Modern | VerMahilen, 5-0 MTGO League Companion (1) 1 Yorion, Sky Nomad Creatures (37) 2 Spellskite 3 Restoration Angel 4 Archon of Emeria 4 Elite Spellbinder 4 Giver of Runes 4 Leonin Arbiter 4 Noble Hierarch 4 Skyclave Apparition 4 Stoneforge Mystic 4 Thalia, Guardian of Thraben Instants (4) 4 Path to Exile Artifacts (7) 1 Batterskull 1 Maul of the Skyclaves 1 Sword of Fire and Ice 4 Aether Vial Lands (32) 1 Forest 5 Snow-Covered Plains 2 Horizon Canopy 4 Branchloft Pathway 4 Brushland 4 Field of Ruin 4 Ghost Quarter 4 Razorverge Thicket 4 Temple Garden Sideboard (15) 3 Auriok Champion 3 Burrenton Forge-Tender 1 Containment Priest 4 Rest in Peace 3 Winds of Abandon 1 Yorion, Sky Nomad 2