Felidar RetreatFelidar Retreat isn't worth considering, it's worth including in absolutely anything that cares about lands or even just has more than your average amount of fetches
Ardenvale Tactician Throne of Eldraine offered no shortage of card advantage in the Adventure mechanic, and its hard to argue against the impact it had on White as a color
There are a bunch of really good Blue exile target creature effects
Tims Zuran Spellcaster (Ice Age/Alliances) , Suq'Ata Firewalker (Mirage/Visions/Weatherlight) , Rootwater Hunter (Tempest/Stronghold/Exodus) , Thornwind Faeries (Saga/Legacy/Destiny) , Stinging Barrier (Masques/Nemesis/Prophecy) Psionic Gift and Hermetic Study are fine, but they require a two card investment: the creature you are enchanting, and the enchantment itself
The only problem was that by this point, it was clear that Bitterblossom wasn't actually that good in Modern, meaning its usefulness outside of Commander and Cube was low