Karn said nothing—he just grasped the powerstone and squeezed tightly. The wild flashing ceased.

Mystery Booster 2

Energy Flux

All artifacts have "At the beginning of your upkeep, sacrifice this artifact unless you pay {2}."

The List

Masters Edition IV

World Championship Decks 2000

Mercadian Masques

All artifacts gain "At the beginning of your upkeep, sacrifice this artifact unless you pay o2."

"Nothing endures but change."
—Heraclitus

Fifth Edition

All artifacts gain "During your upkeep, pay o2 or bury this artifact."

Introductory Two-Player Set

Rivals Quick Start Set

Fourth Edition

During each player's upkeep, destroy all artifacts that player controls. The player may pay an additional o2 for each artifact he or she wishes to prevent Energy Flux from destroying.

Fourth Edition Foreign Black Border

Summer Magic / Edgar

Foreign Black Border

Revised Edition

All artifacts in play now require an upkeep cost of o2 in addition to any other upkeep costs they may have. If the upkeep cost for an artifact is not paid, the artifact must be discarded.