Experiment One Experiment One trades in +1/+1 counters to regenerate itself, which can make for a fairly persistent creature in the right build
Because if you are able remove all of the defense counters on the battle and destroy it, it triggers and allows you to cast it flipped for free, giving you Serra Faithkeeper
Raw copies firmed up rather than sliding off the release-window high, which is the better signal for a modern card
Plus, it also sees play in Charizard and Pidgeot ex decks, where it gets the nod over other Pidgeotto cards thanks to its free Retreat Cost
Until then, however, we can sit back, sort our cards, and reminisce about the unforgettable times Base Set 2 has given us
-Introduces the first support for the "Doom King" archetype to the OCG/TCG