Cloud was an easy choice for the face commander of the deck, even before we settled on making the main playable character of each game the general first choice for each deck's commander
Tazri also has an activated ability that costs a full WUBRG (one of each mana color), which grants your Ally creatures +X/+X where X is the number of colors among those creatures
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Could be okay in a limited format though
The third is a triggered ability that gives you the option to cast the card when the last time counter is removed
Still, I'd recommend that if you want to upgrade Elven Empire with another precon and without serious budget constraints, Guided by Nature is a good step in the right direction