While we already saw the power of Thalia in powered formats, where she can hate out combo decks and slow down sweepers, such as in the Five-Color Humans deck above, the card has also enjoyed a great deal of success as just a good card for aggressive, creature-heavy decks. Creatures (27) 3 Fiend Hunter 4 Champion of the Parish 3 Avacyn's Pilgrim 3 Mayor of Avabruck 3 Thalia, Guardian of Thraben 2 Restoration Angel 3 Sigarda, Host of Herons 4 Silverblade Paladin 2 Druid's Familiar Lands (25) Spells (8) While Thalias ability is so good, she would likely see a fair bit of play even without first strike, its actually the first strike that really gets her over the finish line
With this combo, you can instantly charge up Pokemon who struggle to amass the right energy otherwise
Secret Lair x Final Fantasy: Grimoir This is the big one
That means that if you exile Flickerwisp with Yorion, the wisp will return next end step exiling Yorion, which will then enter on the next end step exiling wisp, and repeat
Could be some spicy anti-Moat tech, or just a way to ensure that your creatures can always block everything, while also avoiding Earthquake