Decks like Atraxa, Praetors' Voice, Reyhan, Last of the Abzan, or Ezuri, Claw of Progress can easily draw three to five extra cards each turn just by doing what they already do
The best of the bunch is probably the Machamp from Stormfront (#20) with the attack Take Out
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With a Scurry Oak in play, if you cast Rosie and create a Food token, Rosies other ability will trigger
Axgard Armory provided those aggro decks with the powerful equipment they needed to get through and deal more damage to close out games
While maybe not as competitive in a Constructed setting, I still think it makes a good addition to any Simic or Bant build that uses +1/+1 counters and other ways to buff your creatures