Here's the pull rates I got with my spread: Double Rares (ex): 22.2% chance (1 in every 4.5 packs) Ultra Rares (Full Arts): 3.70% chance (1 in every 27 packs) Illustration Rares: 11.1% chance (1 in every 9 packs) Special Illustration Rares: 1.85% chance (1 in every 54 packs) Here's my favorite chase cards from Phantasmal Flames, none of which I actually pulled from my samples, but product I'll be buying as single cards or tracking as the new Mega Evolution expansion releases: Mega Charizard X ex 130/094 (Gold Hyper Rare) Mega Charizard X ex 125/094 (Secret Art Rare) Mega Lopunny ex 128/094 (Secret Art Rare) Mega Sharpedo ex 127/094 (Secret Art Rare) Rotom ex 126/094 (Secret Art Rare) Mega Lopunny ex 115/094 (Full Art Rare) Mega Charizard X ex 109/094 (Full Art Rare) Mega Heracross ex 109/096 (Full Art Rare) Something to note is that I came across quite a few doubles of standard ex cards
JPN secondary market (SNKRDUNK, Card Rush, major retailers)
While you could use any energy type to fullfil these requirements, a Double Colorless Energy would provide two energy in a single turn
One of my favorite formats of all time combines Five Color, Highlander, and Pauper, into a deck that requires 250 cards, 20 cards of each color, only commons, and no more than one copy per common (other than basic lands)
Serra's Sanctum is one of the most powerful cards that sees basically no play
Then, whenever a creature you control with counter on it dies, you get to draw a card