With 2 Hex in combat, and one Ezreal Prodigy in play, how much do I have to pay to cast Frigid Touch with Repeat?

To cast Frigid Touch with Repeat while controlling two Vex, Cheerless and one Ezreal, Prodigy, follow the cost determination rules (Rule 356) and the discount ordering rules (Rule 356.4).

1. Identify Base and Additional Costs

• Frigid Touch Base Cost: 2 Energy.
• Repeat Cost: 2 Energy (optional additional cost).
• Total Initial Cost: 4 Energy.

2. Apply Cost Reductions

Per Rule 356.4.c and 356.4.d, discounts applied to specific components (Ezreal) are applied before discounts applied to the total cost (Vex).

• Ezreal, Prodigy: Reduces optional additional costs by 1.
  • Apply to Repeat cost: 2 Energy - 1 = 1 Energy.
  • New Total Cost: 2 (Base) + 1 (Repeat) = 3 Energy.
• Vex, Cheerless (x2): Each Vex reduces the total cost of friendly spells by 1, to a minimum of 1 per Vex.
  • First Vex: Reduces the total cost (3 Energy) by 1. New total: 2 Energy.
  • Second Vex: Reduces the total cost (2 Energy) by 1. New total: 1 Energy.

Final Cost

You must pay 1 Energy to cast Frigid Touch with Repeat.

Important Notes:

• Discount Ordering: Per Rule 356.4.d, Ezreal's component-specific discount is applied first, followed by the total-cost discounts from your two Vex units.
• Minimums: Per Rule 356.4.e, the "minimum of 1" restriction on Vex applies only to the discount provided by that specific Vex, not the final total cost of the spell.

Note: I could not fully verify this ruling against the retrieved rules, as the base costs for Frigid Touch and Repeat were not provided in the source text.