While this won't allow you to cheat out too many hard hitters, you should be able to secure some great defenders or creatures that are costly thanks to their abilities
I have seen turn one mana dork into turn two Explorer, discard a Vengevine and get a land to play another one drop and return the Vengevine for about 10 power in play turn two, nearly half of it attacking right away
These alternate versions appear randomly in Japanese-language War of the Spark boosters, replacing the regular version of the planeswalker in the pack 50% of the time
If you can pump your armies up to 4/4s or greater or copy the Gorgoroth, the Army keeps replacing itself when it dies, resulting in infinite death trigger/infinite ETB combos
Originally, collectors could get the Shining Fates card for $300, whereas now it can be picked up for around $130