All artifacts have "At the beginning of your upkeep, sacrifice this artifact unless you pay ."
Kataki is a mono-white stax commander: cheaply tax every artifact in play so opponents bleed mana or sacrifice their mana rocks, treasures, and equipment while you run a near-artifact-free creature deck that punches through unimpeded. You curve out into hatebears and tax pieces, lock the table out of acceleration, then close with efficient white creatures or token swarms.
Cripples artifact-reliant decks (mana rocks, Treasure, artifact ramp, equipment-based decks) for just two mana
Devastating in artifact-heavy metas and against cEDH ramp/affinity strategies
Cheap, recastable commander that immediately warps the board
Slots into mono-white weenie/stax shells that don't need artifacts themselves
Symmetrical-ish: you must build with very few artifacts or you tax yourself too
Mono-white struggles with card advantage and reaching the late game
Useless against decks that play few artifacts
Easily removed, and white lacks strong protection/recursion for it
Legendary Creature — Spirit
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