When Vendilion Clique enters, look at target player's hand. You may choose a nonland card from it. If you do, that player reveals the chosen card, puts it on the bottom of their library, then draws a card.
Vendilion Clique is a mono-blue tempo/control commander that wins through evasive damage backed by a wall of counters, bounce, and card advantage. You deploy cheap interaction to stay alive, protect a flying threat (often the Clique herself or other flyers), and grind opponents out while their plans get answered. The ETB lets you strip a key card from any hand—flashing it in at end step or in response to a critical draw is pure tempo.
Mono-blue gives access to the deepest pool of counterspells, card draw, and bounce in the format
Flash lets you hold up interaction and deploy the commander as a surprise blocker or evasive threat
ETB hand disruption can answer a combo piece, board wipe, or fatty before it resolves
Cheap, evasive commander that recasts easily and pressures life totals
Three power on the commander means clocks are slow; you need to assemble repeatable damage
Mono-blue struggles to remove resolved permanents and has weak answers to enchantments/artifacts
Inherently reactive—falling behind on board is hard to recover from in multiplayer
Card filtering on the ETB only delays one card; it doesn't generate true card advantage