Like flashback and aftermath, embalm is sweet, sweet card advantage at the cost of more mana, making it well-suited for Commander for the same reasons as aftermath/flashback
If the greatest power among creatures you control is negative as this creature's ability resolves, X is considered to be 0
You can even use the food normally and gain 3 life points if you are really getting squeezed
Weve seen similar abilities on popular commanders like Prosper, Tome-Bound and Faldorn, Dread Wolf Herald, and now with the new Yasmin Khan + The Thirteenth Doctor duo
The honest weaknesses (and common mistakes) Enchantments are resilient, not invincible
More often than not these decks are your traditional mono-green Elf strategies while splashing black for a few specific cards