Peek

Information that replaces itself. The defining trick of this design is that the card it draws makes looking at your opponent's hand functionally free, turning a tempo cost into a cantrip you spend in the moments that matter: before you commit to a counterspell war, before you tap out for a sweeper, before you walk a creature into open mana. Most hand-reveal effects in blue and black are tied to disruption (Thoughtseize takes a card, Duress strips one), but this one asks for nothing in return except the mana and the slot. That makes it a deckbuilder's information tool rather than an attrition piece: it tells you what the opponent is holding without spending a card to find out, and the replacement draw means it never thins your engine. The trade-off lives entirely in timing. Cast it too early and the hand it shows you is still being assembled; hold it until their draw step and you see exactly what they are about to deploy. It rewards keeping a single blue mana open through a turn cycle, which is the same discipline a control deck already practices, and that overlap is why it has always lived comfortably in spell-dense blue builds that want to know rather than guess.