When assessing value, these elements can play an important role: Expansion and set: Some Pokemon expansions are simply more valuable than others
Youll notice Rodan has a subname that matches Vadrok and that the card has the same cost, creature type, abilities, and power and toughness
Meaning you can use cards from the Black and White base (released in 2011) through the latest Pokemon TCG Expansion (currently Fusion Strike)

[Commander] 1 Sydri, Galvanic Genius [/Commander] [Planeswalkers] 1 Tezzeret the Seeker [/Planeswalkers] [Battles] 1 Invasion of Belenon // Belenon War Anthem 1 Invasion of Vryn // Overloaded Mage-Ring 1 Invasion of Arcavios // Invocation of the Founders 1 Invasion of Tolvada // The Broken Sky [/Battles] [Creatures] 1 Drafna, Founder of Lat-Nam 1 Heir of Falkenrath // Heir to the Night 1 Norns Inquisitor 1 Sage of Lat-Nam 1 Braids, Arisen Nightmare 1 Chrome Host Seedshark 1 Compleated Huntmaster 1 Cryptolith Fragment // Aurora of Emrakul 1 Brimaz, Blight of Oreskos 1 Elesh Norn // The Argent Etchings 1 Elusive Tormenter // Insidious Mist 1 Heliod, the Radiant Dawn // Heliod, the Warped Eclipse 1 Tiller of Flesh 1 Urza, Lord High Artificer 1 Enduring Angel // Angelic Enforcer 1 Essence of Orthodoxy 1 Jin-Gitaxias // The Great Synthesis 1 Sheoldred // The True Scriptures 1 Thought Monitor [/Creatures] [Sorceries] 1 Chart a Course 1 Demonic Tutor 1 Diabolic Intent 1 Rise and Shine 1 Grim Tutor 1 Anchor to Reality 1 Nanogene Conversion 1 One with the Machine 1 Sunfall 1 Thoughtcast [/Sorceries] [Instants] 1 Dispatch 1 Path to Exile 1 Swords to Plowshares 1 Dovins Veto 1 Excise the Imperfect 1 Generous Gift 1 Mirrorweave [/Instants] [Artifacts] 1 Sol Ring 1 Agathas Soul Cauldron 1 Arcane Signet 1 Azors Gateway // Sanctum of the Sun 1 Azorius Signet 1 Dimir Signet 1 Liquimetal Coating 1 Liquimetal Torque 1 Moonsilver Key 1 Orzhov Signet 1 Talisman of Dominance 1 Talisman of Hierarchy 1 Talisman of Progress 1 Thaumatic Compass // Spires of Orazca 1 Blade of Shared Souls 1 Chalice of Life // Chalice of Death 1 Mysterious Tome // Chilling Chronicle 1 Encroaching Mycosynth 1 Primal Amulet // Primal Wellspring 1 Trading Post [/Artifacts] [Enchantments] 1 Arguels Blood Fast // Temple of Aclazotz 1 Gift of Compleation 1 Phyrexian Awakening 1 Corruption of Towashi [/Enchantments] [Lands] 1 Adarkar Wastes 1 Arcane Sanctum 1 Caves of Koilos 1 Command Tower 1 Exotic Orchard 1 Glimmervoid 1 High Market 1 Inventors Fair 1 Path of Ancestry 1 Phyrexias Core 1 Shrine of the Forsaken Gods 1 Spire of Industry 1 Thriving Heath 1 Thriving Isle 1 Thriving Moor 1 Underground River 1 Vivid Creek 1 Vivid Marsh 1 Vivid Meadow 5 Island 5 Plains 5 Swamp [/Lands] [/Deck]

That's how my Diaochan deck took her down
Here, cost reduction and graveyard hate are phenomenal, and youll snag much more powerful creatures worth putting back into play