In my last article I talked about the Breaking News cards, a bonus sheet of spells that show up one in every play booster that depict various crimes being committed across Thunder Junction
You can also activate Fateful Bite for 2 mana at sorcery speed allowing you to sacrifice Radioactive Spider to search your library for a Spider Hero card, reveal it, put it into your hand, then shuffle

Advanced Search Sets Random Syntax Amoeboid Changeling Archangel Archangel Avacyn Archangel Elspeth Archangel of Strife Archangel of Thune Archangel of Thune Archangel of Tithes Archangel of Wrath Archangel's Light Avian Changeling Change of Fortune Change of Heart Change of Plans Change the Equation Changeling Berserker Changeling Hero Changeling Outcast Changeling Sentinel Changeling Titan Changeling Wayfinder Chomping Changeling Cultural Exchange Empyrial Archangel Exchange of Words Exquisite Archangel Fire-Belly Changeling Game-Trail Changeling Ghostly Changeling Grave Exchange Icatian Moneychanger Indomitable Archangel Liesa, Forgotten Archangel Lluwen, Exchange Student Lord of Change Maelstrom Archangel Maelstrom Archangel Avatar Moonglove Changeling Mothdust Changeling Omni-Changeling Opal Archangel Quickchange Radiant, Archangel Radiant, Serra Archangel Razia, Boros Archangel Resolute Archangel Sizzling Changeling Skeletal Changeling Soul Exchange Sublime Archangel Turtleshell Changeling Valiant Changeling Vault of the Archangel Venomous Changeling War-Spike Changeling Webweaver Changeling Winds of Change Woodland Changeling

Things like Yorion, Sky Nomad and Airbender Ascension make for some cool interactions
Don't forget there's an entire deck dedicated to the glorious villains of the show, and they'd love nothing more than to force your opponents to face villainous choices
Mega Lucario ex is no exceptionit demands energy management, deck synergy, and precise timing