Doable, but Id rather run a commander that costs less than 7 mana
In the games, Lightning is a former soldier on a mission to rescue her sister before it's too late, which drags her into conflict against multiple factions and strange beings
But in reality, token is more of a modifier to other deck themes than a theme unto itself
A few thallids arent entirely self-sufficient like the old ones, but they could be slotted into a fungus deck with no trouble
If Oblivion Ring phases out or phases in, none of its triggers will trigger, because Oblivion Ring does not leave the battlefield and does not enter the battlefield
He also happens to be one of the only cards in the deck that deals with both of the decks themes, because he also makes a player into the monarch when he enters the battlefield