While a lot more efficient than Sprout Swarm it is more easily disrupted and needs more tools to be able to get out of control as Swarm can on a bloated stagnant board
This deck played around 20 enchantments to get triggers off his cast ability to make his legendary fun, like Rhystic Study and Sylvan Library, around 15 Frogs and changelings to use his ability on like Yargle, Glutton of Urborg and The Gitrog Monster and then some Voltron-ish and unblockable elements to get some punches in like Archetype of Imagination and Whispersilk Cloak
Heres the step-by-step process straight from the TCG game director, Atsushi Nagashima
Discover acts a little like cascade, letting you exile cards from your deck until you find one that matches the mana value of the original card
Traveling Chocobo Rarity: Mythic Rare TYPE: Creature SUBTYPE: Bird CMC: 3 Mana cost: USD: $18.41 EUR: 19.29 TIX: 0.25 EDHREC RANK: 2058 (3/2) You may look at the top card of your library any time
In the end, Matt Tabak, Principal Magic Editor at Wizards of the Coast, was asked for comment and declared on Twitter, "No, if you don't pay the energy, you don't draw the cards