The most famous of which are the Charlie Brown Medallions
Approach needs to be cast twice for you to win, and it has seen play as a win condition in control decks with lots of filtering, card selection, and scry/surveil effects
You've got rummages for days if all you care about is synergizing with discard, but the elder dragon's greater appeal is what you're drawing , offering heavily discounted miracles on big instants and sorceries you draw
For Modern and Pioneer, they remain the backbone of competitive manabases
Strength of Will Strength of Will is a reversal of sorts in that it stops your creature from getting removed, but in the process it can also give it a massive buff
your money is tied up while singles keep spinning