These five are just scratching the surface of useful tools
Mystery engine replaces Float so that we dont have tools that can be Field Blowered: U-Turn returns to hand, and I dont attach Muscle Band until its relevant, so by the time its Blowered, its math already applied to take a KO on my previous turn
1996 Japanese Charizard Holo ($9K0$13.5K) This is from the earliest Japanese set in existence, and it is different than the 1999 design which will be worth less, which did not have horizontally arranged energy requirements
Persuasive Interrogators If I can investigate, make five Clues and then play this, all I need is 10 mana to win the game. I think these Persuasive Interrogators have given you Stockholm Syndrome
Then, K'rrik turns every Black pip in your deck into Phyrexian Mana, everything from casting costs to activated abilities
Once you succeed, you get to play the card you exiled via Hideaway for free