With that background, Ill present different points of view depending on what game mode(s) a Magic player may prefer, which I believe is one of the key reasons why the Too Many Cards question lacks a universal answer
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
(5/3/2019) If a permanent leaves the battlefield this way but ends up in a zone other than a library (most likely because it's a player's commander in the Commander variant), it's still counted to determine how many cards to reveal.
Most of the ones I currently have assembled in those colors tend not to be swingy in nature, and taking down 4 defense counters might not be an easy task to accomplish on my own