Does Vex's cost reduction apply to both the base cost and Repeat cost of a spell?

Ruling: Vex's cost reduction applies once to the total cost of a spell, including all additional costs like Repeat. For a spell costing 2 with Repeat 2, the total cost with Vex would be 3 (base 2 + Repeat 2 - Vex discount 1).

Sequence:

• Calculate base cost of the spell
• Add any additional costs (like Repeat)
• Apply Vex's cost reduction once to the total

Nuances:

• Vex's discount is applied after all additional costs are added
• The discount applies to the entire spell cost, not separately to base and Repeat costs
• If Repeat cost uses colorless or universal energy, Vex's discount can reduce that portion