If they know that the deck was shuffled properly, then this shouldn't give them any information about the next card they draw
By itself, the enchantment works as a deterrent, making your opponents think twice about attacking
Heres the list so far: Major gains (30% or more): Minor gains (10-30%): Chalice of the Void, Noble Hierarch, Through the Breach, Doubling Season, Horizon Canopy, Engineered Explosives, Ancestral Vision, Mox Opal, Crucible of Worlds, Dark Confidant, Scapeshift, Brushland, Fulminator Mage, Ancient Stirrings, Lotus Bloom
Check out other decks of a similar power level with relatively good Rare and above cards - MTG Arena Starter Decks
You'll see this card in Rakdos, Yawgmoth, and even sideboards across the board
Color pie bends and breaks are risky, and blue cards like Acid Rain have all kinds of fun breaking those rules