What set is Otharri, Suns' Glory from
Paradox Pokmon were first introduced in Scarlet and Violet, where, depending on which you version you played, either Ancient or Future Pokmon were brought to the present by a professor and their time machine
Blooming Marsh Blooming Marsh, with 109 copies, may not fit the slower Sultai or Four-Color Midrange decks but it's widely adopted by decks like Jund Sacrifice that need enough early untapped lands to consistently cast one-mana creatures on turn one
Ancient Adamantoise Any use you get out of Ancient Adamantoise makes it great, because the rebate of 10 treasures is massive and often means you can cast a larger and stronger spell after this
The mechanic is just very different than how we'd execute on it today
Top red common: Volcanic Spite Removal always does well here - it's good regardless of a deck's strategy or a format's foibles