It ETBs with energy, sure, but it can convert energy to creatures without tapping, which, of course, means you can generate infinite tokens pretty easily with the other cards here
Editors Update (September 2024): An esteemed Pokemon card fan just asked a question regarding the allowed number of Pokemon ex cards in one deck
"ULTRA RARE" refers to V, VMAX, EX, and GX Pokemon Cards

Tella, Great Sage Commander Deck List Let me Tellah you What View on Archidekt Commander (1) 1 Tellah, Great SageTellah, Great Sage Creatures (12) 1 Archmage EmeritusArchmage Emeritus 1 Deekah, Fractal TheoristDeekah, Fractal Theorist 1 Goblin ElectromancerGoblin Electromancer 1 Harmonic ProdigyHarmonic Prodigy 1 Murmuring MysticMurmuring Mystic 1 Storm-Kiln ArtistStorm-Kiln Artist 1 Stormcatch MentorStormcatch Mentor 1 Talrand, Sky SummonerTalrand, Sky Summoner 1 Third Path IconoclastThird Path Iconoclast 1 Veyran, Voice of DualityVeyran, Voice of Duality 1 Young PyromancerYoung Pyromancer 1 Zaffai, Thunder ConductorZaffai, Thunder Conductor Sorceries (14) 1 Blasphemous ActBlasphemous Act 1 Brass's BountyBrass's Bounty 1 Crackle with PowerCrackle with Power 1 Epic ExperimentEpic Experiment 1 Explosive SingularityExplosive Singularity 1 Expressive IterationExpressive Iteration 1 Faithless LootingFaithless Looting 1 Mana GeyserMana Geyser 1 Mizzix's MasteryMizzix's Mastery 1 PonderPonder 1 Sea Gate Restoration // Sea Gate, RebornSea Gate Restoration // Sea Gate, Reborn 1 Serum VisionsSerum Visions 1 Surge to VictorySurge to Victory 1 Treasure CruiseTreasure Cruise Instants (18) 1 AetherspoutsAetherspouts 1 Chaos WarpChaos Warp 1 Comet StormComet Storm 1 CounterspellCounterspell 1 Dig Through TimeDig Through Time 1 Expansion // ExplosionExpansion // Explosion 1 FoilFoil 1 Frantic SearchFrantic Search 1 Galvanic IterationGalvanic Iteration 1 MisdirectionMisdirection 1 Mystic ConfluenceMystic Confluence 1 Narset's ReversalNarset's Reversal 1 PyrokinesisPyrokinesis 1 ResculptResculpt 1 Seething SongSeething Song 1 Silundi Vision // Silundi IsleSilundi Vision // Silundi Isle 1 This Town Ain't Big EnoughThis Town Ain't Big Enough 1 Valakut Awakening // Valakut StoneforgeValakut Awakening // Valakut Stoneforge Enchantments (5) 1 City on FireCity on Fire 1 Double VisionDouble Vision 1 Metallurgic SummoningsMetallurgic Summonings 1 Shark TyphoonShark Typhoon 1 Sunbird's InvocationSunbird's Invocation Planeswalkers (2) 1 Jaya BallardJaya Ballard 1 Saheeli, Sublime ArtificerSaheeli, Sublime Artificer Artifacts (11) 1 Arcane SignetArcane Signet 1 Decanter of Endless WaterDecanter of Endless Water 1 Hedron ArchiveHedron Archive 1 Izzet SignetIzzet Signet 1 Midnight ClockMidnight Clock 1 Mind StoneMind Stone 1 Mindsplice ApparatusMindsplice Apparatus 1 Pyromancer's GogglesPyromancer's Goggles 1 SkullclampSkullclamp 1 Sol RingSol Ring 1 Talisman of CreativityTalisman of Creativity Lands (37) 1 Cascade BluffsCascade Bluffs 1 Command TowerCommand Tower 1 Exotic OrchardExotic Orchard 1 Fabled PassageFabled Passage 1 Ferrous LakeFerrous Lake 1 Fiery IsletFiery Islet 9 IslandIsland 1 Izzet BoilerworksIzzet Boilerworks 9 MountainMountain 1 Mystic SanctuaryMystic Sanctuary 1 Prismatic VistaPrismatic Vista 1 Reliquary TowerReliquary Tower 1 Riptide LaboratoryRiptide Laboratory 1 Riverpyre VergeRiverpyre Verge 1 Scavenger GroundsScavenger Grounds 1 Shivan ReefShivan Reef 1 Steam VentsSteam Vents 1 Stormcarved CoastStormcarved Coast 1 Sulfur FallsSulfur Falls 1 Temple of EpiphanyTemple of Epiphany 1 Thundering FallsThundering Falls And there we have it: a really fun take on one of the most flavorful cards in the set

TRADING CARD GAME (TCG) Card Sleeves help Duelists keep their cards secure and protected during Duels
Some argue that it will become as important to modern collecting as the 1986/87 Fleer basketball set or the 1909-11 T206 White Border insert set. Despite the vast numbers of cards sold, the majority were regularly played with and traded by kids around the world