Ygra, Eater of All looks like it's going to be a fun deck, but it now shares a footprint with another deck in my collection: Mahadi, Emporium Master
Whether or not you should sell a golden chocobo is a tough answer, but if you must have an answer right away, I'd find the card grading service I trust the most, get the chocobo in a slab and hold onto it
Then, on another turn, you can cast that spell without paying its mana value (only at sorcery speed)
Bushmaster, Coiled Henchman Chishiro, the Shattered Blade Ikra Shidiqi, the Usurper Imoti, Celebrant of Bounty Kadena, Slinking Sorcerer Kaseto, Orochi Archmage Lonis, Cryptozoologist Lonis, Genetics Expert Omarthis, Ghostfire Initiate Sachi, Daughter of Seshiro Sakiko, Mother of Summer Sasaya, Orochi Ascendant Seshiro the Anointed Shigeki, Jukai Visionary Shisato, Whispering Hunter Shizuko, Caller of Autumn Sidisi, Brood Tyrant Sidisi, Regent of the Mire Sidisi, Undead Vizier Sivriss, Nightmare Speaker Sosuke, Son of Seshiro The Serpent Society Xyris, the Writhing Storm
1.7%inclusion 73.3K decks 4.38M decks Ultimate Magic: Holy 1.7%inclusion 53.4K decks 3.19M decks Duty Beyond Death 1.7%inclusion 58.3K decks 3.50M decks Dawn Charm 1.7%inclusion 72.9K decks 4.38M decks Flicker of Fate 1.7%inclusion 72.4K decks 4.38M decks Mana Tithe 1.6%inclusion 71.3K decks 4.38M decks Final Showdown 1.6%inclusion 69.3K decks 4.38M decks Continue
The weight of 3 mana is covered by green's mana generation, so it didn't bother me as much as I expected