Anikthea, Hand of Erebos adds black to the mix and brings enchantments back from the graveyard as creatures
Hows that for a super summon
Now that I have thought about it a few days, I think Solitude is clearly the better of the two, since it is not only a premium removal spell but also a viable win condition with its 3/2 body
Sazh's chocobo is a big part of Sazh's story and a great metaphor for the relationship he has with his son
Plus, things like Eldrazi Temple, Urza's Mine, Urza's Power Plant, and Urza's Tower for even more top-end and explosivness
When it is sacrificed, Zimone will recur it into a land, which will activate Zimone's trigger and flip it back up into a Sakura-Tribe Elder again