Throw in some recursion for a real game[casthaven]Melira, Sylvok Outcast[/casthaven] is a nice one if shes available in the cube, and [casthaven]Sheoldred, Whispering One[/casthaven] is another classic
The best Elf commanders in MTG are the heart of your deck
But even that doesnt guarantee you wont lose by decking, and you give your opponent a lot of time to look for some tricky out
This can be useful early in the game, as playing Cinderella only costs one ink
Most formats have a banned list of some kind
Speaking of which, the partner keyword means that Thrasios will essentially always be at the helm of a deck with more than just blue and green spells in it (I dont think Ive ever seen a partner list ever that doesnt have at least one unique color between the two), providing even more value when deployed early