Zenistar

The Zenistar is a melee weapon available through the Daily Tribute system, as a reward for logging in for 300 cumulative days. Its Charge Attack ejects a flying fire disc, damaging nearby enemies.

Characteristics
This weapon deals primarily and  damage.

Advantages:
 * Third highest base damage of all melee weapons, along with Jat Kittag, Fragor Prime, Sibear, and Scindo Prime.
 * Innate damage – effective against Infested and Cloned Flesh.
 * High damage when the disk is ejected.
 * Comes with polarity.
 * High status chance.
 * Staggers all enemies on normal attacks (like Jat Kittag).
 * Disc can be thrown using charge attacks, damaging enemies in range of the disc.
 * The Zenistar's damage changes to physical damage and gains a bonus to attack speed.
 * Disc benefits from bonus damage from stealth while invisible, increasing damage heavily.

Disadvantages:
 * Low attack speed.
 * Low critical chance.
 * Bonuses from, or  mods do not apply while the disc is attached.
 * Stance slot has a polarity, matches Rending Crane.

Acquisition

 * This Zenistar is exclusive to the Daily Tribute system, and can only be attained after 300 accumulated log-ins. It comes with a free weapon slot and pre-installed Orokin Catalyst.
 * With (which introduced the Daily Tribute system) releasing on December 3, 2015, this weapon first became available on September 26, 2016.

Trivia

 * The Zenistar's name likely stems from zenith, whereas its design is inspired by a sundial.
 * The Zenistar is the first weapon in Warframe that changes its damage distribution, in this case heat is replaced by physical damage of the same amount when the disk is discharged from the weapon. This allows the weapon to be made for pure elemental builds (with the disk on) or have the ability to deal physical damage (like heavy slash procs) with the disk ejected.
 * The console version of the Zenistar had different stats upon release, being identical to those of the Scindo Prime with innate damage instead of physical damage. It also however couldn't launch its disk, similar to how the Azima couldn't, basically making the Zenistar an elemental Scindo Prime, whereas if it could launch the disk, it would be exactly like the Scindo Prime.

Bugs

 * Sometimes the disc stays inside the Zenistar even when the disc has launched. This is only a visual bug and does not affect the weapon in any case.