mtg commander eldrazi deck Unbound (Colorless) is included in the package Eldrazi Confluence

If its a character, the player can play the card for free no matter the cost, so its a big gamble

Id mostly pass on this, though a really heavy red deck could consider it

9 Jenova, Ancient Calamity Adds Value To Sacrifice Builds Green And Black Sacrifice Decks Are A Common Archetype Jenova, Ancient Calamity would make a good Golgari sacrifice commander , thanks to her consistent source of card draw

There's also some creatures you randomly wouldn't want attacking, like Dragon's Rage Channeler, and I could see wanting to keep it around

You'll probably want to play a bunch of sagas in a Yuna deck, but if you wanted to get cute with it, you could also take advantage of a sacrifice outlet and cards that come with tons of counters like The Millenium Calendar or Dark Depths