Draco King Drake boss guide: weaknesses & drops (7DSO)

Boss

Elder Dragon's Heart Drake

Difficulty

Hard

Min. BP12,515

Players

Stats

HP139,895

ATK2,919

DEF1,058

Weaknesses

Earth20%

Holy20%

Resistances

Thunder20% Fire

Fire20%

All Elements10%

Zone

Boss Arena

Dragon KingIn-game tip

All Elemental Burst Resistance is increased. Upon a successful counter, the increased Resistance effect is removed. Applies up to 5 times.

Don't just spam Bursts into him here — every clean counter you land strips one stack of his raised Elemental Burst Resistance, so prioritize landing counters first, then dump your Burst damage once the stacks are gone.
Bring units that stack Holy Weakness on him to claw back the resistance loss, and avoid leaning on a single Burst-heavy carry while the resistance is still ramped.

Dragon's FuryIn-game tip

Each time a Burst is activated, All Element Defense decreases.

Now Bursts work for you: each Burst you fire shreds his All Element Defense, so coordinate your team to chain Bursts back-to-back and snowball the defense down before he resets.
Pile on Holy Weakness while the defense is dropping so your follow-up hits land even harder, and time your biggest nuke for after several Bursts have stacked the shred.

Moveset — the real numbers

Its AI decides when it uses what, so there is no fixed rotation to memorize — but every damage %, reach, duration and crowd control below is exact.

Attack	Damage (% of ATK)	Reach	Duration	Control
Forward lungeLong straight-line poke that reaches well past melee range; sidestep off the line instead of backing up.	—	4m	2.6s	—
Five-hit rakeA slow narrow string of five hits down a thin lane; one dodge clears the whole sequence if you go sideways.	—	1m	6.03s	—
Knock-up sweepFrontal cone that pops you into the air, leaving you open to follow-ups; stay out of the front arc.	—	2m	4.75s	AirBorne
Slam knockdownTight ring around the boss that knocks you flat; roll out before the circle lands or you eat the chain.	—	3m	5.67s	Knockdown
Arena stun pulseHuge room-wide pulse that stuns; light damage but the stun is the danger, so save a cleanse or i-frame for it.	—	35m	4s	Stun
Bind detonationTwo-stage stun then a massive blast over the whole arena; break the bind in time or the second hit nearly one-shots.	—	35m	8s	Stun
Phase-two beamVery long straight beam that staggers; it covers most of the floor, so commit to a side dodge early.	—	23m	5s	Stagger
Pinpoint blastTiny high-damage burst on a single spot with a stun; just step off the marker and it whiffs.	—	1.8m	4.1s	Stun
Air-juggle comboFive-hit line string that knocks up then knocks down; getting clipped by the first hit means riding the whole juggle.	—	2m	5.93s	AirBorne + Knockdown

The phase descriptions are the official in-game boss tips; the tactical bullet points are our advice. Every damage value, reach, duration and crowd-control effect in the moveset is the boss's real in-game value. Attack names are descriptive labels.