mtg play with top card revealed

mtg play with top card revealed can someone please explain this to me? I'm not understanding where it says that the target opponent reveals the card of my library. : r/mtg Top 10 Cards That Play

Name: mtg play with top card revealed can someone please explain this to me? I'm not understanding where it says that the target opponent reveals the card of my library. : r/mtg Top 10 Cards That Play
Brand: heatertek.com
SKU: 20074923867
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SKU: 20074923867

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Description

Each pack comes with 1 card of rarity Rare or higher, 3 to 4 uncommons, 9 to 10 commons, and a land card

Aura-based removal like Darksteel Mutation or Song of the Dryads are nice ways to deal with the God-Eternals

Every block has a little tribal in it

As long as your devotion to red is less than five, Purphoros isn't a creature

The goal is to spread small amounts of damage around on your opponent's side of the board and take advantage of characters that become more powerful when the opponent has damaged characters in play