Phantom Speed is a Sacred Seal skill introduced in Fire Emblem Heroes.

Overview

Phantom Speed is a sacred seal designed to ensure the success of skills that compare the speed stat of the wielder and another unit; even if the wielder does not otherwise meet the requirements. It does this by mirroring the opponent's Speed, and then adding +5/8/10 to the value depending on the level of the seal.

This impacts both weapons and skills - specifically the weapons Ayra's Blade, Vassal's Blade and Giga Excalibur as well as the refined Wing Sword and Rhomphaia; as well as the skills Windsweep, Watersweep and Flashing Blade. However, Phantom Speed does not make the wielder more likely to be effected by Chill Speed; as Chill Speed does not actually compare between stats.

Stats

• Phantom Speed 1
• Phantom Speed 2
• Phantom Speed 3

Name	Activation	Capacity
Phantom Speed 1	On stat comparison during combat	N/A
Effects	If a skill compares unit's Spd to a foe's or ally's Spd, treats unit's Spd as if granted +5.
Users	Creation Cost: 20 GB, 100 B, 50 SC

Name	Activation	Capacity
Phantom Speed 2	On stat comparison during combat	N/A
Effects	If a skill compares unit's Spd to a foe's or ally's Spd, treats unit's Spd as if granted +8
Users	Creation Cost: 60 GB, 200 B, 50 SC

Name	Activation	Capacity
Phantom Speed 3	On stat comparison during combat	N/A
Effects	If a skill compares unit's Spd to a foe's or ally's Spd, treats unit's Spd as if granted +10.
Users	Creation Cost: 400 GB, 1000 B, 100 SC