You have a 2-hour window
I am personally stoked to see how Regigigas can power up any of the Regi Pokemon in play, drop-down Thorton, attach either a Twin Energy [Rebel Clash] or Aurora Energy [Sword and Shield], and have a fully powered Amazing Rare Reshiram [Shining Fates] that can OHKO a Flying Pikachu VMAX [Celebrations]
Also, its got vigilance and flying, so youll start attacking people as early as turn 3
So, Nomads-en-Kor for the ability activation, and a combination of Pearl Medalion, Cloud Key, or Urzas Incubator for cost reduction, and you have a creature able to keep flickering in and out ad nauseum
Longtusk Cub snowballs on its own in Limited, but when it can haste the Energy counters of Whirler Virtuoso, produce free value with Attune with Aether, or transmute the unnecessary mana from Servant of the Counduit, it becomes a Constructed powerhouse