Sephiria Planet Build: Full Guide for Hardmode Runs

Overview: What the Sephiria Planet Build Does

Requirements Before You Start

The planet build in Sephiria is a high-damage setup that relies on Planet and Wind Song bond items working together. Players on the Steam community forums report that this combination is one of the easiest ways to clear level 30 difficulty for most characters, with damage output around 3k per second when assembled correctly.

The build works by stacking Planet items for passive orbiting damage, then using Wind Song to boost attack speed and trigger set combos. A Telescope artifact dramatically increases Planet damage, making it the single most important item to find during a run.

This guide walks you through the exact sequence: starting setup, early item priorities, mid-run decisions, and how to recover when the run goes sideways.

What You Need Before Starting

Before you attempt this build, make sure you have:

• Sephiria unlocked (any costume works, though the Cosmos Conductor costume is the one used in the reference run)
• Access to Tier 30 Hardmode (Dark Roots Retreat)
• Fruit Skewer unlocked at the fruit stand
• Wishing Fountain unlocked
• Basic familiarity with the imprint mechanic (imprinted tablets stay active but leave your inventory)

Recommended Starting Setup

Set up your run with these starting options:

Community reports also mention Luck 20 as a strong alternative if you prefer more item drops over survival.

Step-by-Step Build Sequence

Step 1: Floor 1 — Establish Your Core Items

Your first goal is to find Planet and Wind Song items to trigger set combos. The Dark Planet from your Wishing Fountain should carry your damage early.

Priority actions:

• Take Artifact at the first shop if offered — you want to find Telescope as early as possible
• Visit the Anvil to upgrade toward a Majestic Wand
• Grab every Planet item you see
• Pick up Lightning Stone if it appears early — it boosts your Stormcloud damage

Do not imprint anything yet. Keep your tablet options open until you know what set combos you can complete.

Step 2: Floors 2–3 — Complete Set Combos and Imprint

By floor 2, you should have at least one set combo active. The reference run completed Planet at 2 and was actively looking for Wind Song by the first boss.

Key decisions:

• Imprint your primary damage tablet once you have a second copy. This frees inventory space while keeping the effect active
• Look for Spike — it synergizes extremely well with Planets, especially if you find Telescope later
• Take Haste when offered; attack speed indirectly boosts Planet damage through Wind Song
• Skip the Banner unless you have spare slots — you move too much to stand in its area

Step 3: Floors 3–4 — Find Telescope or Thunder Armor

This is the critical mid-game window. The build transforms if you find:

• Telescope — massive Planet damage multiplier
• Thunder Armor — enormous overall damage boost

If you reach the trader on floor 3 without either, prioritize Artifact upgrades at every opportunity. The reference run found the Galaxy sheet music on floor 3, which provided a strong MP-cost reduction for the special attack.

Step 4: Floors 4–5 — Stack Damage and Defend

By the Wasteland, you should have:

• Planet at 5+ stacks
• Wind Song at 3+ stacks
• Stormcloud at 4+ stacks
• At least one imprinted damage tablet

Take Defense and Health upgrades when offered. The reference run noted that enemies hit harder in these later floors, and the character's potions heal less than expected.

Step 5: Final Floor — Boss Preparation

Before the final boss:

• Drink all potions
• Equip your highest damage setup
• Consider skipping optional fights (like the Vampire Bat) if you're low on HP — the risk isn't worth the reward

Common Mistakes to Avoid

1. Imprinting Too Early

Imprinting removes tablets from your inventory. If you imprint the wrong item, you cannot swap it later. Wait until you have at least two copies of a tablet before imprinting.

2. Ignoring Wind Song

Planet items alone won't carry the build. Wind Song provides the attack speed that makes Planets efficient. The Steam community thread specifically calls out "planets/wind song" as the core combo.

3. Taking Items That Pollute Your Pool

Every item you take increases the pool of possible drops. Avoid taking situational items you won't use (like Banner) just because they complete a set. The reference run explicitly traded away the Banner because it wasn't worth the pool pollution.

4. Overextending Against Optional Bosses

The Vampire Bat fight in the final floors is risky in a small arena. The reference run chose to skip it, and that was the right call. If you're below 50% HP, skip optional fights.

5. Not Managing MP Costs

The Galaxy sheet music reduced the special attack cost from 36 MP to 12 MP. Watch your MP costs — if you're running dry in boss fights, prioritize MP-cost reduction items.

Advanced Tips for the Planet Build

Tip 1: Use Evasion as Your Defense Layer

Multiple items in the reference run provided evasion. The final setup had 10 evasion from combined sources. Evasion is especially valuable because potions heal less for this character.

Tip 2: Take Experience Upgrades Late

On the final floors, the reference run took Experience upgrades repeatedly. More levels mean more stat points, which can compensate for missing key items.

Tip 3: Reroll Strategically

Save your rerolls for shop items. The reference run rerolled Stormcloud items to get better versions, and used rerolls to find better options at traders.

Tip 4: Hunt Hidden Areas

Several hidden areas in Dark Roots Retreat contain bonus stats:

• A hidden area in the first floor grants Lightning damage increase and MP
• Hidden locations can give free levels
• The library area has a hidden room with Electrocution

These free stats add up over a run.

Tip 5: Know When to Skip the Vampire

The Vampire Bat gives Life Steal potential, but the fight is risky in a small arena. The reference run skipped it and still cleared. If you have a Cinnamon Stone (extra life), you can afford the risk; otherwise, skip.

Frequently Asked Questions

Do Planets benefit from attack speed buffs?

Yes, but indirectly. According to the Steam community discussion, Planets are affected by attack speed through the Wind Song bond item. Wind Song is the link that converts attack speed into more Planet damage.

What's the most important artifact for this build?

Telescope. The reference run called it "a big boost" and the Steam community thread says to "take every planet and telescope on the way." If you find Telescope, your damage output roughly doubles.

Is this build viable on lower difficulties?

Yes. The build works on any difficulty, but it shines on Hardmode because the damage output scales well. On lower difficulties, you can afford to be greedier with item choices.

What if I can't find Telescope?

The build still functions without it. The reference run did not find Telescope and still cleared Tier 30 Hardmode. You'll deal less damage, so compensate with more defensive items and careful play.

Which costume should I use?

Any costume works. The reference run used the Cosmos Conductor costume, but the build mechanics are identical across costumes. Choose whatever costume you have unlocked.

Related Guides

• Sephiria Companion Build
• Sephiria Defense Build
• Sephiria OP Build
• Sephiria Staff Build