MapleStory Classic damage calculator

Known issues

Gaps in what is known, in the order they matter: numbers nobody has published or measured, and skills the page does not cover at all. How the game itself works is not an issue and is not listed here. Timings marked * in the table are the guessed ones.

• Meso Explosion has no formula. No database publishes a meso-to-damage conversion, so the damage per line is invented. The Chief Bandit row that uses it is the least trustworthy number on the page.
• Lucky Seven's mastery is a flat 0.5 with nothing behind it. The skill ignores the weapon mastery skills, and what it uses instead is not printed anywhere. Everything else about the throw is the database's; only that factor is made up.
• Attack speed is the weakest assumption on the page. One step of weapon speed is modelled as 10% of the animation, which nobody has measured on this server. The Ayumilove table the physical timings come from is GMS 2009 and is demonstrably wrong about this server's speed cap, so it cannot settle the question either.
• Animation timings marked * are guesses: Slash Blast, Rush, Shout, Dragon Roar, Arrow Blow, Double Shot, Power Knockback, Arrow Bomb, Inferno, Iron Arrow, Blizzard, Power Guard, the three summons, Double Stab, Drain, Disorder, Shadow Web, Shadow Meso, Steal, Energy Bolt, Magic Claw, Fire Arrow, Poison Breath, Poison Mist, Cold Beam, Thunder Bolt and Heal. Only the timing is assumed; every damage %, hit count and target count is still read from the game data.
• Where equipment attack belongs is unverified. This page counts it as weapon attack, while the OSMS variable list counts everything outside weapon and shield as Attack Power, which is worth double. The switch in the Character panel shows both, and they differ by a lot.
• Final Attack is not counted anywhere. It fires its own animation on a success roll and would lift every warrior, page, spearman, hunter and crossbowman row that carries it.
• The accuracy check is not modelled. Every hit is assumed to land, so these are damage output figures, not what a monster with a real Avoid stat would let through.
• Poison Breath's direct hit is not the number on its line. OSMS says the hit comes from a hidden second skill; this page uses the printed Basic Attack for want of anything better. Its cloud is on solid ground.
• Summon damage is a model, not a reading. The dragon's line prints a mastery tier and that tier is used; the two birds print none and borrow the class's weapon mastery. The attack interval is assumed as well.
• Elemental Crash is assumed to lift immunity as well as resistance, up to neutral. The skill line says it removes resistance and says nothing about immune monsters.
• Shadow Web is paced by its snare, not its animation: one cast per 5 s, on the reading that a second web cannot be laid while the first still holds. Shadow Meso's throw animation is assumed on top of that.