Weakstone

Artifact, 4 (4)
Whenever a creature attacks, it gets -1/-0 until end of combat.¹
During the brothers' childhood, Tocasia took them to explore the sacred cave of Koilos. There, in the Hall of Tagsin, Mishra discovered the mysterious Weakstone.
Illus. Justin Hampton

Crystal Keep Rulings Summaries

• The -1/-0 applies to attacking creatures from all players. [Aahz 1994/06/01]
• Extended tournaments (see Rule 803) have always banned this card.
• Note - The card is of type "Artifact" and not "Continuous Artifact". [Oracle 1998/07/01]

Format Legality	Legal in Vintage, Legacy Banned in Extended, Standard
Printings (1/1)	Antiquities (Uncommon)