Legendary Planeswalker - Rowan Will Kenrith +2: Until your next turn, up to two target creatures each have base power and toughness 0/3 and lose all abilities
Incorporate Baeloth Barrityl, Entertainer to get Treasure tokens for ramp and Shiny Impetus to goad another creature
2 Daazen Metatron, the True Draco Mechsoldier 2 Master Peace, the True Dracoslaying King 3 Draius III, the True Dracoknight 3 Dinomight Knuckler, the True Dracofighter 2 Ignis Heat, the True Dracowarrior 3 Majesty Maiden, the True Dracomage 1 Glow-Up Bulb 3 Dragonic Diagram 3 True Draco Succession 3 Disciples of the True Dracophoenix 1 Monster Reborn 2 Instant Fusion 1 Harpies Feather Duster 3 Terraforming 2 Pot of Duality 3 Revival of the True King 3 True Draco Revelation 1 Metalfoes Orichalc 1 Fullmetalfoes Alcahest 1 Invoked Cocytus 1 Invoked Raidjin 1 Gaia Drake the Universal Force 1 Crystal Wing Synchro Dragon 1 Clear Wing Synchro Dragon 1 Crystron Glyongandr 1 Crystron Quandax 1 Coral Dragon 1 Number 61: Volcasaurus 1 Zoodiac Drancia 1 Zoodiac Broadbull 1 Gaia Dragon the Thunder Charger

Like most Pokmon cards, the value of Energy Retrieval depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Evolutions)
Two official books now available