Because I Have Willed It

If an instant or sorcery spell has {X} in its mana cost, choose the value for X first, then reduce the cost by {1}. For example, Volcanic Geyser with X chosen as 4 costs {3}{R}{R} to cast if this scheme is face up.

Abilities that reduce the cost of a spell apply after abilities that raise them. For example, Borrowed Malevolence with both modes chosen costs {1}{B} to cast if this scheme is face up.

If an opponent cast a spell during the opposing team’s turn and then left the game, that spell counts when determining whether the last ability of this scheme triggers.