Tutors are powerful, and fetching the Academy, Strip Mine, and Library of Alexandria straight into play, and in response to land destruction spells, is an ability not to be scoffed at
Much like the free spells from Modern Horizons 2, which well get to later, Modern Horizons 3s Flares have format-warping potential
Flavor Text "We had years to prepare, while they had mere minutes." Kerrick, sleeper agent Number 308 Language English Legal Formats Commander, Legacy, Vintage Not Legal Formats Alchemy, Brawl, Competitive Brawl, Historic, Modern, Pauper, Pioneer, Standard, Timeless Rulings (12/8/2022) No Mercy's ability triggers whenever any creature, including creatures you control, deals damage to you, not only combat damage.
Scar, Finally King (Enchanted) $205.09 He Just Couldn't Wait After all this time, Scar finally steals the throne
Outside of that, however, its probably too niche to be worth a slot
The names for the first five of these spawn from the five shards in the plane of Alara, introduced in, you guessed it, Shards of Alara