If you simply dropped all the cute little subthemes and focused on Y'shtola's strengths the deck becomes an absolute monster
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In the casual Commander variant, you can use an oversize card as your commander - a commander starts the game face up on the table and tends to stay that way, so as above it doesn't hurt that it's oversized
Gaston is just showing off, now
If the answer is no, its likely you want to concentrate on ramp
They can build up a nasty team quickly, but I really like including them in aristocrat decks for a consistent source of sacrifice fodder