Dual Blade gem tags: Combo 100%, Movement over Smash
✍️ Alice・愛麗沙
Line one is not a choice: Combo is on literally every Dual Blade skill, 100% coverage, so a +2.0% Combo damage line is a genuine +2.00% on everything you do. Almost no class gets a lossless first line. The surprise is line two — Movement outranks Smash — and not because Movement is a good tag in general. It is that this class’s main damage button and its ultimate both carry Movement, so the instinct that “Movement means the escape skills” is exactly backwards here. The order is Combo, then Movement, then Smash and Support level with each other, Disrupt far behind; damage on all three. Two structural notes: sword-qi damage and damage-over-time take no tag scaling at all, so builds advertising big numbers there collect less than the tooltip implies; and never spend a Gem Skill Engraver on a crude-tier gem, because promotion re-randomises the tag set.
Coverage: a table that is unusually kind
A gem tag line pays out only on skills carrying the tag, so a line’s real worth is its printed number times the share of your damage that carries it.
| Tag | Rotation skills carrying it | Share of output | One damage line, on total output | One cooldown line, best case |
|---|---|---|---|---|
| Combo | 6 / 6 | 100% | +2.00% | −0.65% |
| Movement | 4 / 6 | 80% | +1.60% | −0.52% |
| Smash | 2 / 6 | 65% | +1.30% | −0.42% |
| Support | 2 / 6 | 20% | +0.40% | −0.13% |
| Disrupt | 2 / 6 | 8% | +0.16% | −0.05% |
Coverage is compiled from Korean skill-tag listings and rotation shares, not an official disclosure. The two right-hand columns scale one Elite Star Prism line (+2.0% damage / −0.65% cooldown) by that share; the cooldown column assumes the seconds saved convert fully into extra casts, which they do not — read it as a ceiling, not an expectation.
Combo reads 1.00 coverage — every skill, no exceptions, no leakage. That is the Dual Blade’s biggest structural advantage in this whole system: line one requires no selection, no waiting and no agonising. If a gem rolls Combo, it is usable, full stop.
Movement lands at 80% and +1.60%. Smash, which most people would have named second on reflex, sits at 65% and +1.30%.
Why Movement beats Smash
Most players skim past Movement because on most classes it hangs off repositioning tools. This class is the exception.
Dual Blade output is extremely concentrated: apart from the piercing skill and the main dash skill, the rest of the kit contributes next to nothing. And that main dash skill carries Movement itself — it is tagged Smash, Combo and Movement together. The ultimate carries the same three, covering the identical set a second time.
That is what pushes Movement to roughly eighty percent while Smash sits nearer sixty-five. The gap does not come from one tag being better than another; it comes from which tag is printed on the button that does the work.
While we are here: the Movement tag and the movement-speed stat are unrelated. One is a skill category, the other a number on your stat sheet. The gem means the former.
Two traps, and one line that a rune will move
Disrupt is an unambiguous trap: two non-core skills, about 8% coverage, +0.16% per line — more than tenfold worse than Combo for the same slot.
Support is a softer trap. On paper it covers two skills, which sounds respectable, but one of those is a buff you are explicitly advised not to press for damage, so effective coverage falls below the nominal twenty percent.
And one line shifts under you: the basic rune strips Movement off one of the dash skills and puts Support there instead. Carve a full set of Movement lines, change runes, and that column shrinks the same day. The gem plan is downstream of the rune plan.
Keep the two vocabularies apart, too. “Multi-hit enhancement” and “smash enhancement” on a rune read the judgement outcome of each individual hit; a gem tag reads the word printed on the skill — different systems.
One damage line against one cooldown line
Every tag line forces the same fork: damage or cooldown. An Elite Star Prism gives +2.0% damage or −0.65% cooldown per line. The ladder runs Crude S 1.7/0.55, Elite 2.0/0.65, S 2.1/0.7, Whole 2.2/0.75, and Triple Quartz 2.1/0.7 across two lines.
Grant cooldown the most generous reading: every saved second becomes an extra cast. That is roughly +0.65% more casts against +2.0% more damage from the same slot. Damage wins by about three to one, and real conversion is worse, because pre- and post-cast delays are pronounced and this class’s pacing is governed by stacks and chain steps.
Dual Blades have an extra pitfall. One rune shortens a cooldown — and if you simultaneously stack skill-use speed, the window in which that shortened cooldown matters gets smaller. Speed and cooldown are not the same lever, and stacked wrongly they partly cancel. The comparison. Verdict: all three lines damage.
Reading the “separate multiplier”, and what takes no tags at all
Gem tags occupy their own bucket, multiplied against attack power, damage-increase and crit rather than merged with them. But within that bucket, lines add. All your Combo damage lines sum to one number and multiply in once. “Each 2% line compounds” is false; “1% of Combo damage is about 1% of total damage, scaled by coverage — and your coverage is 1” is true.
Dual Blades need one caveat other classes do not. Some of your damage takes no tag scaling whatsoever. Sword-qi additional damage is excluded from tag scaling and from skill-damage-increase alike, and damage-over-time is excluded from the smash and multi-hit judgement enhancements. So a rune whose coefficient is largely damage-over-time looks strong on the tooltip and collects from neither system.
Crude gems are a trap, and not because they’re weak
The mechanism: promotion re-randomises the tag set. Fusing three gems into one rolls fresh tags on the result — unless you spend an extra 5 Gem Skill Engravers at promotion to carry the first-slotted gem’s tags across. So any engraver spent on a gem that is not your endpoint is wiped at the next promotion. Leave crude and Crude S alone, fill all twenty-two sockets by volume, and reserve engravers for tag carry-over only. Taiwan’s supply is the adventurer pass at ranks 23 and 24 — five per rank free, ten paid.
Dual Blades get a bonus nobody else has: because Combo covers everything, a random gem that produced even one Combo line is already worth using, so “fuse several, socket the best” works especially well here.
Cheaper still: fresh Star Prisms roll random tags anyway, so fuse several and socket the best roll rather than forcing one stubborn gem into shape. Officially a re-roll is just “random”, and no odds distribution has ever been published — we checked namu wiki, Inven, arca, dcinside and the Korean gem simulators.
Korean-server lookahead: the tag swap, stated correctly
Korea added a tag swap on 2026-04-23, and most versions of it in circulation are wrong. It is not two gems trading tags. You pick two tag types, and every gem on your account — stored and socketed alike — has those two exchanged. Pairs compose into a single permutation within one operation, so three-way cycles are reachable, though the primitive is still a pair. 1,000,000 gold per permutation; different permutations for damage and cooldown lines means two operations and 2,000,000 gold. Hard limit: damage lines swap only with damage lines, cooldown only with cooldown.
Unlocked by a one-time quest from a bank NPC in one Korean-server town, then usable at any town bank. Korean-server only; not shipped on Taiwan, and no Taiwanese announcement has promised it. The strategic effect is direct: a gem that rolled three matching lines of a tag you do not want stops being junk and becomes an asset. Do not dismantle, do not re-roll.
What to do now, what to ignore, what would change this
Keep, in order: any Combo line, ignoring whatever is paired with it. Movement second, because it covers the main dash skill and the ultimate, not your escapes. Smash third, covering the same core skills, just fewer. Support is level with Smash on paper and lower in practice. Ignore Disrupt; Elemental, Summon and Survival do not exist on this class.
Adjust against your own rotation, especially if your rune choices diverge from the mainstream.
Three things would invalidate this page. If Taiwan’s main dash skill lacks the Combo tag — Korea added it in a later update, and earlier listings show only Movement and Smash — the 100% first line does not hold. If Taiwan’s basic rune does not swap that dash skill’s Movement for Support, Movement’s coverage is higher than the table shows. And if Taiwan opens a steady engraver supply or ships the tag swap early, hoarding purely for promotion stops being right.
