Over time, your faerie army grows while your opponents are kept off balance by goaded creatures
Lots of the cards we looked at here arent in Modern because theyre either banned like Birthing Pod or simply arent legal like Worldly Tutor
Its great in a deck with +1/+1 counters to spare, but dont rely on its training ability alone to get those counters (speaking towards EDH, at least)
It ETBs with energy, sure, but it can convert energy to creatures without tapping, which, of course, means you can generate infinite tokens pretty easily with the other cards here
Start out with Armix after dropping cheap protection in the form of Lightning Greaves, Swiftfoot Boots or (my favorite) Welding Jar
Unless you count Biorhythm, which really should be legal given the set-up required to kill someone