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**Sextant of Unstable Currents**- Item Level 128
- Binds when picked up
- Unique
- Trinket
- Requires level 70
- Equip: Improves critical strike rating by 40.

Equip: Your spell critical strikes have a chance to increase your spell power by 190 for 15 sec. - Sell Price: 9 11 60

**Sextant of Unstable Currents** is an epic trinket for DPS casters.

## Source Edit

This item drops from Fathom-Lord Karathress in Serpentshrine Cavern.

## NotesEdit

- There is an internal cooldown that prevents this trinket from proccing more than once every 45 seconds.
- The proc chance is 20%.

## Effective DamageEdit

The effective +damage granted by this trinket is achieved in a method almost identical to that of Shiffar's Nexus-Horn. Essentially, to get the most out of this trinket, you want shorter cast times, and higher crit.

The formula for calculating the amount of effective +damage granted by Sextant of Unstable Currents is -

E = 190 * 15 / (45 + (t / (0.2 * c)))

Where...

E = effective +damage t = cast time c = critical strike chance

The following Java Program can be used to obtain a table of effective +damage for different casting speeds:

public static void main(String[] args) { float crit; float time; float effective; for(time = 1; time < 6.5f; time += 0.5f) { for(crit = 10; crit < 101; crit++) { effective = 190 * 15 / (45 + (time / (0.2f * (crit / 100)))); System.out.println("<tr><th>" + crit + "</th><th>" + time + "</th><td align=\"center\">" + effective + "</td>"); } } }

- 1.5s - Scorch, Searing Pain, Wrath

Base Crit % | Cast Time | Effective +Damage |
---|---|---|

20.0 | 1.5 | 34.545456 |

25.0 | 1.5 | 38.0 |

30.0 | 1.5 | 40.714287 |

35.0 | 1.5 | 42.903225 |

40.0 | 1.5 | 44.705883 |

45.0 | 1.5 | 46.216217 |

50.0 | 1.5 | 47.5 |

- 2.0s - Lightning Bolt

Base Crit % | Cast Time | Effective +Damage |
---|---|---|

20.0 | 2.0 | 30.0 |

25.0 | 2.0 | 33.52941 |

30.0 | 2.0 | 36.38298 |

35.0 | 2.0 | 38.737865 |

40.0 | 2.0 | 40.714287 |

45.0 | 2.0 | 42.396694 |

50.0 | 2.0 | 43.846153 |

- 2.5s - Frostbolt, Shadowbolt, Incinerate

Base Crit % | Cast Time | Effective +Damage |
---|---|---|

20.0 | 2.5 | 26.511627 |

25.0 | 2.5 | 30.0 |

30.0 | 2.5 | 32.884617 |

35.0 | 2.5 | 35.309734 |

40.0 | 2.5 | 37.37705 |

45.0 | 2.5 | 39.160305 |

50.0 | 2.5 | 40.714287 |

- 3.0s - Fireball

Base Crit % | Cast Time | Effective +Damage |
---|---|---|

20.0 | 3.0 | 23.750002 |

25.0 | 3.0 | 27.142857 |

30.0 | 3.0 | 30.0 |

35.0 | 3.0 | 32.439022 |

40.0 | 3.0 | 34.545456 |

45.0 | 3.0 | 36.382977 |

50.0 | 3.0 | 38.0 |