This works, but not by unearthing Blightsteel
Hare Apparent | Illustration by Milivoj Ceran If the Commander singleton rule has ever seemed overly restrictive, you might be happy to know that it doesnt apply to certain cards that let you play any number of copies with their name
Throw in the fact it can double as a surprisingly flexible reanimation spell and you have one of the best Limited cards in MTG Foundations
(Look at the top X cards of your library, then put any number of them into your graveyard and the rest on top of your library in any order.) Once Lydia Frye has been blocked, increasing the blocking creature's power to 3 or greater won't cause Lydia Frye to become unblocked
Milling a bunch of cards then putting all your binned lands onto the battlefield sounds great for both ramp and landfall
Legality depends on the tournament format -- Tovolar, Dire Overlord // Tovolar, the Midnight Scourge can be legal in some formats and banned or restricted in others