Because I Have Willed It - Oversized Archenemy Scheme (OE01) from Archenemy: Nicol Bolas Schemes, available at 401 Games Canada.

• Rarity: Common
• Finish: Normal
• Artist: Adrian Majkrzak
• Card Text:
  (An ongoing scheme remains face up until it's abandoned.)
  Spells you cast cost 1 less to cast.
  At the beginning of your opponents' end step, if they cast four or more spells this turn, abandon this scheme.