You can of course use Doubling Season to make tons of tokens on the battlefield, theres likely a better way to put this enchantment to use
Ill explain the parameters of my collection goal real quick: I start off with all English Pikachu cards including all printed variants (not worried about further variations in 1st edition stamps on the Base Set Pikachu as it has plenty of variations as is)
Fated Clash Final Showdown Flawless Maneuver Frontline Medic Gavony Gideon's Phalanx Gideon, Ally of Zendikar Gideon, Martial Paragon Grand Crescendo Gyome, Master Chef Hajar, Loyal Bodyguard Hakoda, Selfless Commander Hero of Goma Fada Hour of Devastation Inspiring Call Join Shields Kamahl's Will Kamahl, Heart of Krosa Karfell Kennel-Master King Darien XLVIII Kytheon, Hero of Akros Last Night Together Lena, Selfless Champion Lightshield Array Linvala, Shield of Sea Gate Localized Destruction Lorehold Command Majestic Myriarch Make a Stand Moogles' Valor Myojin of Towering Might Necron Monolith Nylea, God of the Hunt Odric, Lunarch Marshal Purphoros, God of the Forge Ready // Willing Resistance Reunited Roar of Challenge
Card Set(s) -Royal Blood- [OP-10] CARD VIEW OP10-114 | UC | CHARACTER X type Character card from your hand and add it to the top of your Life cards face-down