I dont know that it is the best of the Charms (I would give that title to Izzet Charm), but unlike Izzet Charm, where you overpay by one mana for any of two to three desirable effects, you more-or-less break even on each of Selesnya Charms charming possibilities
4 Scavenging Ooze Ooze That Just Keeps Growing 2 Mana Cost in Green Creature Scavenging Ooze is an infuriating creature to fight, going from a simple 2/2 upon its entrance to suddenly being a massive threat as long as its controller has mana and anyone in the game has a graveyard full of creatures
For collectors, though, the investment potential is a bit more complex
Just as we can't say that a Lightning Bolt is always better than a Tidings, the question of Savannah Lions and Jackal Pup was not strictly one way or the other every time
It can also provide tons of card advantage by copying activations of Greed and Priest of Fell Rites
And then theres white, the color that consistently feels like it gets the short end of the stick in many key gameplay elements of Commander, and mana ramp is no exception
