name: Energy Flux
originalText: 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.
printings: 3ED, 4BB, 4ED, 5ED, ATQ, FBB, ITP, ME4, MMQ, PLST, RQS, SUM, WC00
text: All artifacts have "At the beginning of your upkeep, sacrifice this artifact unless you pay {2}."