Rancor was a strong consideration, however, the lack of creatures in the deck ended up causing it to be cut.
Calix was also a consideration, however, I chose to cut it due to both the price point as well as the fact that it essentially functioned as an
oblivion ring without the free draw. Krond fits as well but once again was cut due to the low creature count.
Lastly, the best advantage Sythis has over Estrid is the ability to cause enchantments to become cantrips. This, couples with its low mana cost makes it an astonishingly powerful budget commander, especially in a more control-focused shell like the one above.