Hidden Cataract Elemental create a 1/1 blue and

create a 1/1 blue and black Faerie Rogue creature token with flying

they're treated as though they don't exist

tap Desecration Demon and put a +1/+1 counter on it

−6: Destroy up to three target creatures and/or other planeswalkers

+1: Each opponent exiles two cards from their hand

Hidden Cataract Elemental create a 1/1 blue andHidden Cataract enters the battlefield tapped. {T}: Add {U}. {4}{U}, {T}, Sacrifice Hidden Cataract: Discover 4. Activate only as a sorcery. (Exile cards from the top of your library until you exile a nonland card with mana value 4 or less. Cast it without paying its mana cost or put it into your hand. Put the rest on the bottom in a random order.)