The most extreme example of this is the One of One Ring
Archmages Charm is extremely pushed, a solid permission spell, a good way to build card advantage for hitting land drops, and a fantastic tool against Deaths Shadow, Wild Nacatl, Goblin Guide, Pyxis of Pandemonium, Champion of the Parish, Aether Vial, Delver of Secrets, Hardened Scales, Amulet of Vigor, Benthic Biomancer, Glistener Elf, Noble Hierarch, Viscera Seer, and sometimes even Hexdrinker (just to mention a few)
The most prized cards of the bunch are the Imagine Courageous Critters from Bloomburrow s non-Standard offerings
When you get this turn one and are able to relatively freely drop it down then you are in for a good time
I definitely think that Im only scratching the surface when it comes to Bloomburrow and Im looking forward to playing these cards and seeing what other people do with them