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Wan Shi Tong, Librarian plays as a mono blue control commander that leans on reactive play, tight timing, and slow, repeatable advantage instead of fast combo lines. Flash and flying let you keep mana open for countermagic, then deploy your commander at instant speed to draw cards or punish any opponent who searches their library. Wan rewards patient play, clean sequencing, and turning every interaction into card advantage.

Your overall plan is classic blue control: stall early threats, trade resources efficiently, sculpt a strong hand, then convert excess mana into overwhelming draw power. Once the board slows down, Wan becomes a repeatable engine that fuels your combos or lets you grind through any table.

Combos

Most lines generate infinite mana, infinite casts, or infinite triggers. You close the game with Blue Sun's Zenith targeting the table, or by looping ETBs and bounce until opponents cannot rebuild.

Valley Floodcaller + Retraction Helix + a mana positive rock = Infinite mana or storm by bouncing the rock repeatedly.

Hullbreaker Horror + mana positive rocks = Infinite mana or full board bounce while staying protected.

Kitsa, Otterball Elite + Dramatic Reversal + rocks = Infinite casts or infinite mana depending on your rock configuration.

Displacer Kitten + Aether Channeler + mana positive rocks = Infinite ETBs, bounces, mana, and draws.

Isochron Scepter + Dramatic Reversal + at least 2 mana from rocks = A classic infinite mana loop.

If you do not have Blue Sun's Zenith, you can still close by making infinite Birds with Aether Channeler, bouncing every permanent with Hullbreaker Horror, and/or wheeling with Narset, Parter of Veils in play. At that point you just hold up interaction and pass the turn with the win locked.

Mulligan Priorities

Wan Shi Tong mulligans tighter than most commanders because your first two turns determine whether you survive long enough to leverage your commander’s draw engine.

If there is a turbo deck in the pod You need mana and a way to not lose early. If your hand does not do both, ship it.

Keep hands with: Fast mana, a cheap piece of interaction, and ideally a cantrip or card flow. Your job is to slow the turbo deck long enough for the table to stabilize.

Do not keep: Slow value hands, clunky hands that rely on resolving Wan, or reactive hands with no early mana.

Control the early game, stop the first threatening line, and Wan will carry the late game. Every time you interact, try to get extra value out of it, especially if you save the table.

If the pod is midrange or slower The mulligan becomes more forgiving, but you still want early mana and something proactive.

Keep hands with: Reliable mana, early card flow, incremental value, or a setup piece. You do not need immediate interaction unless a fast deck is present.

Universal rules

If you cannot cast a spell on turn 1, mulligan. If you do not have a blue source, mulligan. If your hand only works after resolving Wan, mulligan. If you have two lands, a rock, and anything useful, it is usually a keep. If your hand is all interaction with no mana, mulligan.

The deck rewards hands that do something now and scale later. Avoid hands that look close but rely on drawing the perfect card. Consistency wins more games than hope.