While the card may not have been explicitly built for Commander, it was built in a world where Wizards R&D knew that the format existed
Its hard to pin down why this is, especially since there are over a dozen cards in the deck that Id categorize as card advantage, with the best ones being Idol of OblivionIdol of Oblivion, SkullclampSkullclamp, and Shamanic RevelationShamanic Revelation
When tables rely on nonbasics, this instant can wipe huge chunks off life totals and end games immediately
Cragflame offers excellent stats and keywords, especially considering it comes stapled to a 3/3
It creates a Boo creature token each turn, encouraging you to either grow the rodent with your plus ability or 'fling' it at the enemy with the minus
For those of us who seek guidance in our Ventures, Adventures in the Forgotten Realms offers nine classic module framed lands, like this new version of Evolving Wilds