Who gets the Heartbeat effect from The Heart Rate Mystery?

Only Guardian characters: Firtho, Gratia and Lorin in the current roster. None of our build pages pick it yet, so on anyone else it only adds its 4,762 HP and 370 ATK at Lv. 80.

Is it worth getting duplicates of The Heart Rate Mystery?

Each duplicate raises its Resonation Tier by one, up to Tier 5. From Tier 1 to Tier 5 its scaling values go from 10 to 20 and 2 to 4. At Tier 5 it reads: "The character using this Motive gains 20% Max HP. When providing healing, the ATK of all characters on the team is increased by 4% for 40s, stacking up to 5 times."

How strong is The Heart Rate Mystery at Lv. 80, and what does it cost?

4,762 HP and 370 ATK, 16th highest ATK among the 17 four-star Motives (shared with 1 other). Reaching Lv. 80 takes 21,500 Ounce, 10 Guardian's Instinct, 7 Guardian's Insight, 7 Guardian's Challenge and 14 Guardian's Legacy.

The Heart Rate Mystery

Updated 1 November 2026 · 4-star · Guardian · 370 ATK at Lv. 80

The Heart Rate Mystery is a 4-star Guardian Motive (weapon) in Silver Palace, with 370 ATK and 4,762 HP at Lv. 80. Its Heartbeat effect at Tier 1: The character using this Motive gains 10% Max HP. When providing healing, the ATK of all characters on the team is increased by 2% for 40s, stacking up to 5 times. Only Guardian characters get it: Firtho, Gratia, Lorin.

Stats by level

Lv. 1 to 80

LevelLv. 80

Base HP

4,762Lv. 80

Lv. 1 · 216×22.0 from Lv. 1

Base ATK

370Lv. 80

Lv. 1 · 16×23.1 from Lv. 1

Max level in the beta files.

Heartbeat effect

Resonation Tier 1 to 5

One copy

The character using this Motive gains 10% Max HP. When providing healing, the ATK of all characters on the team is increased by 2% for 40s, stacking up to 5 times.

Each duplicate raises the Resonation Tier by one. Only Guardian characters get this effect: Firtho, Gratia and Lorin.

Breakthrough materials

Six breakthroughs, Lv. 20 to 70

Lv. 20
- ×3
1,000Ounce
Lv. 30
- ×7
1,500Ounce
Lv. 40
- ×7
2,000Ounce
Lv. 50
- ×7
3,000Ounce
Lv. 60
- ×5
4,000Ounce
Lv. 70
- ×9
10,000Ounce
Total
- ×10
- ×7
- ×7
- ×14
21,500Ounce

Books in the total, left to right: Guardian's Instinct, Guardian's Insight, Guardian's Challenge, Guardian's Legacy. Where they drop is on the Motives page.

In the database

One of 8 Guardian Motives, 4 of them 4-star.
Its 370 ATK at Lv. 80 is the lowest of the 17 four-star Motives.
Its 4,762 HP at Lv. 80 is the most any four-star Motive gives, shared with others.

Lore

Rapid. Slow. Skipping a beat, or pounding ever harder.
A fast heartbeat signaled danger; too slow, and it meant death. The girl, long haunted by the Grim Reaper, had learned to live by the rhythm of her pulse since childhood.
Yet after a certain someone returned, her heart seemed to quicken somehow in <Gender M=his F=her> presence. But why? After all, her heart wasn't even real.

Data compiled from the Dichotomy beta game files, checked 1 November 2026. Launch is 14 December 2026 (UTC+8), and names and numbers can change before then.

Frequently asked questions

3 answers, always open

Ask on Discord

Who gets the Heartbeat effect from The Heart Rate Mystery?: Only Guardian characters: Firtho, Gratia and Lorin in the current roster. None of our build pages pick it yet, so on anyone else it only adds its 4,762 HP and 370 ATK at Lv. 80.
Is it worth getting duplicates of The Heart Rate Mystery?: Each duplicate raises its Resonation Tier by one, up to Tier 5. From Tier 1 to Tier 5 its scaling values go from 10 to 20 and 2 to 4. At Tier 5 it reads: "The character using this Motive gains 20% Max HP. When providing healing, the ATK of all characters on the team is increased by 4% for 40s, stacking up to 5 times."
How strong is The Heart Rate Mystery at Lv. 80, and what does it cost?: 4,762 HP and 370 ATK, 16th highest ATK among the 17 four-star Motives (shared with 1 other). Reaching Lv. 80 takes 21,500 Ounce, 10 Guardian's Instinct, 7 Guardian's Insight, 7 Guardian's Challenge and 14 Guardian's Legacy.