One such deal is on this Magic: The Gathering Final Fantasy Booster Play Box
No matter what style or color combination of Dragons you want to play, the deck comes with a legendary Dragon that will be perfect as your commander
As another example, if my opening hand has a one-drop, a two-drop, a three-drop and four different four-drops, then I will usually bottom the worst three four-drops in the hope of drawing into a powerful five or six-drop, while keeping the cards that will ensure a perfect 1-2-3-4 curve-out
For only one more mana than Remove Soul, you outright countered any creature your opponent cast, plus got to draw a card
If you add another mana, there are plenty more effects
You also set up the persist combo automatically with Celes around (e.g., Murderous Redcap + Viscera Seer), and it rewards you for going wide with creatures, if you prefer the fairer route