If you have the cards to do it, play Marie Favored Kitten on turn 2, Maurices Machine on turn 3
Like most Magic: The Gathering cards, the value of Snake Umbra depends on a few consistent factors: its rarity, the printing and finish (regular or foil), its physical condition, and the set it was printed in (Rise of the Eldrazi)
MtG Final Fantasy: Through the Ages Mythic Rare Zidane Tribal - Ragavan, Nimble Pilferer Legendary Creature Monkey Pirate 2/1 Whenever Ragavan deals combat damage to a player, create a Treasure token and exile the top card of that player's library
And here we are
I rarely play storm or decks where proliferating matters, but I can absolutely imagine this card putting in a lot of work for someone that is used to playing both of those and causing an absolutely overwhelming amount of value at instant speed
When this Legendary Creature card enters or attacks, you look at the top six cards of your library