Orim's Chant

A Time Walk you cast on the opponent's turn. Naming a Silence effect a "stax piece" undersells what this does in a combo shell: cast it in response to the opponent's instant, in their upkeep, or on their draw step, and they spend an entire turn unable to cast a single spell while you assemble or protect a kill. The one-white front half is the protective floor: it answers the lone counterspell, the lone removal spell, the lone interactive card that would break up your turn, for the price of a single mana left open. The kicker is where the design earns its reputation. Add another white and creatures can't attack this turn either, which turns a tempo-positive Silence into a hard Fog: an alpha strike walks into it and bounces, a lethal swing fizzles, and the player who cast it pays a single extra mana to do it. Few cards fold counterspell-proofing and a combat reset into the same instant at this rate. The split personality is the point: the same card that locks down a control opponent so a combo player can go off also buys an aggro deck a turn it had no business surviving. That elasticity, one mana for protection, two for a fog, is why it remained relevant long after most one-mana white instants from its era faded.