I think two or three copies of new Thalia will be best, although in Legacy we get many more nonbasic lands than in any other format
Blowing up everybodys lands all at once is a powerful play that completely grinds the game to a halt
Magic: The Gathering | Marvel's Spider-Man Eternal-legal sets (SPE and MAR) are Commander-, Legacy-, and Vintage-legal sets, and individual cards are also legal where already available in other formats
Endurance Sometimes you just need to deal with your opponent's graveyard to stop them going off, and when youre in that pinch, Endurance is what you need
Upcoming Pokmon TCG release, Trick or Trade BOOsters, is coming just in time for Halloween, and every card to collect has been revealed
Other special printings from this subset of cards also command a hefty price tag, and remain the most valuable cards from the set, even if it's cheating a little bit since they're technically their own set