Some examples: Swords to Plowshares, Teferis Protection, Chaos Warp, Great Train Heist (or other Spree cards, you pay extra costs but can go wild), Akromas Will, Deflecting Swat, Wear/Tear, and my personal favorite, Reprieve
The first ability is the one that Hydra decks care about, as it doubles any counters that its controller places on a permanent or player

Bloomburrow Jul 22, 2024 Bloomburrow Reviews EDHREC Baylen, the Haymaker 30,265decks Glarb, Calamity's Augur 23,841decks Ygra, Eater of All 23,655decks Helga, Skittish Seer 20,044decks Eluge, the Shoreless Sea 14,672decks Wick, the Whorled Mind 13,792decks Vren, the Relentless 13,336decks Alania, Divergent Storm 11,844decks Gev, Scaled Scorch 11,763decks Bria, Riptide Rogue 10,720decks Kastral, the Windcrested 10,391decks The Infamous Cruelclaw 10,291decks Clement, the Worrywort 8,834decks Finneas, Ace Archer 8,816decks Zoraline, Cosmos Caller 8,590decks Lumra, Bellow of the Woods 8,257decks Mabel, Heir to Cragflame 7,625decks Maha, Its Feathers Night 7,115decks Camellia, the Seedmiser 6,282decks Muerra, Trash Tactician 5,720decks Dragonhawk, Fate's Tempest 2,887decks Byrke, Long Ear of the Law 1,697decks Hugs, Grisly Guardian 1,480decks Beza, the Bounding Spring 1,462decks Kitsa, Otterball Elite 760decks Commanders (BLC) Ms

To evolve Pokmon, you play out a stage one evolution on top of the corresponding basic Pokmon or put the stage two on top of the corresponding stage one Pokmon
You can only use each of the following effects of "Fiend Reflection of the Millennium" once per turn