Although games against it are often interesting, the larger game of deciding whether to dedicate enough sideboard slots to defeat it or ignore it completely and hope not to play against it is one that is not very satisfying for most tournament players
That being said, however, during their conquest of the multiverse, they did leave plenty behind
Even the non-Enchanted card seems to have held a pretty decent value, at around $13
Infects hayday has passed with hyper-efficient removal like Fatal Push and efficient threats like Orcish Bowmasters, but this is still one of the best infect cards you can play in any Magic format thanks to its evasion
The rate of one energy counter per +1/+1 counter is very good
More so than most of the other cards on this list it lets you outplay your opponent as well which is always an indication of good card design