|Kind of Item||Star|
|First Appearance||Super Mario Maker Phi|
|Latest Appearance||Super Mario Maker Phi|
|It is used to open paths through time|
| Super Star|
A Horostar is an item introduced in Super Mario Maker Phi's Chrono Missions. Mario and friends must collect them in the past levels of the series to progress, similar to Power Stars. They unlock more missions in the other eras in the game and are key to finishing Chrono Missions.
This item is free to use for any Mario fangames so long as you don't take credit for it.
The Horostar looks like a normal Power Star but has a black coloring with lime green eyes.
During Super Mario Bros: Multiverse Degeneration, Themis was able to send Bowser and Mario into the past. After defeating Themis in his god form with the help of the God Mario form, Themis left behind hundreds of Horostars in the past, which act as ticking time bombs if they aren't harnessed and taken care of. Princess Fusee enlists the help of Mario and friends to get the Horostars.
Horostars play a vital role in the Chrono Missions for the game. They can be collected by selecting missions ala Super Mario 64/Super Mario Sunshine/Super Mario Galaxy. Each Horostar has a different assignment put on them in the levels.
Horostars make a return appearance in the game's "Letter" worlds, which are unlocked after the player defeats Blossom Bowser. They appear as part of every new game playthough, fitting next to the coins in the hud. The player must make multiple playthoughs to collect all the Horostars in the Letter Worlds to complete the game 100%.
The Horostars make a return in Super Wario Odyssey albeit with a different name and appearance; they are now called Horomoons and look similar to Power Moons but with the traits of the Horostar, such as their completely black color and green eyes. They only appear in the Painted Kingdom's Artist Alley level; and are found in the paintings sold by Paintburt.
Horostars are confirmed to make a appearance in Super Mario RPG: Silent Stars of the Arcane, although it is unknown what role they play in the game.