Investor / top-tier budget ($1,500+) The #1 M2 Mega Charizard X MUR for forward momentum, or the #2 S4a Shiny Charizard VMAX SSR for mature, graded-market-proven holdings
Frankly I think this card is excellent on its own, but paired with Killian for some extra advantages
Until end of turn, you may cast a spell from among those cards
For example, if you animate Infinite Guideline Station with Bello, Bard of the Brambles while it has fewer than 12 charge counters, it wont gain flying, and it wont gain its attack trigger
An example of this would be the alternative-win cycle from Odyssey blockTest of Endurance, Battle of Wits, Mortal Combat, Chance Encounter, and Epic Struggle
Although many different cards could have Ditto underneath them, the most valuable of them all is the Bidoof