Does Ezreal and Vex reduce the Deflect cost?

Whether Ezreal and Vex reduce Deflect costs depends on the specific card and the nature of the cost. Based on the official rules and FAQs:

Vex

Yes, Vex can reduce Deflect costs. According to RiftJudge FAQ #8444 and #8596, Vex reduces the total cost of a spell, which includes mandatory additional costs like Deflect. Because Deflect is added to the spell's total cost before discounts are applied, Vex's ability can reduce that total.

• Nuance: Vex's "minimum 1 energy" restriction applies only to the spell's base cost, not the total cost including additional costs. Therefore, Vex can reduce the total cost (including Deflect) to 0 if other reductions are also applied.

Ezreal

No, Ezreal does not reduce Deflect costs. According to RiftJudge FAQ #8416, Ezreal only reduces optional additional costs (costs that use both the phrase "as an additional cost" and the word "may").

• Rule: Deflect is a mandatory additional cost (Rule 735.1.d). Because it is not optional, it does not qualify for Ezreal's discount.

Summary:

• Vex: Reduces Deflect costs because it applies to the total cost of the spell.
• Ezreal: Does not reduce Deflect costs because Deflect is a mandatory cost, and Ezreal only discounts optional additional costs.