Magma bomb

Magma bombs, also referred to as falling rocks and volcanic rocks are blazing hot stones ejected from erupting volcanoes, causing them to rain down as a hazard. They oftentimes are only ejected until a particular goal is met, generally involving completing a dungeon within said volcano.

The Legend of Zelda: Ocarina of Time
In The Legend of Zelda: Ocarina of Time, falling rocks appear on the upper portion of Death Mountain Trail, specifically the segment leading up to the climbable wall to Death Mountain Crater. They are always present here when Link is a child, though when he is an adult, they stop once the Fire Temple is completed. Small ones fall all around him in this area, with occasional larger ones actively falling at him. The large ones are also present during the fight against Volvagia, as it drops them while in flight. All falling rocks can be blocked with a shield.

The Legend of Zelda: The Wind Waker
In The Legend of Zelda: The Wind Waker, falling rocks drop near the center of the large central room of Dragon Roost Cavern early on. If one hits a Bomb Flower, the Bomb Flower will be lit.

The Legend of Zelda: Twilight Princess
In The Legend of Zelda: Twilight Princess, falling rocks drop around the base of Goron City until Fyrus is defeated. A particularly gigantic shard-shaped one is ejected and lands during a cutscene, and retains enough heat to drain Link's health away on contact. Later, Midna teleports it to Zora's Domain to unfreeze it, and it remains intact at the bottom of the pool it is dropped into. Once Link obtains Water Bombs, he can use them to destroy it, revealing a Goron has been trapped inside the whole time, but is no worse for wear.

The Legend of Zelda: Phantom Hourglass
In The Legend of Zelda: Phantom Hourglass, falling rocks only appear on the Isle of Ember. They fall with a distinct whistling sound, causing flames to briefly sprout from the point of impact. Blaaz can summon them during his battle, and once he is defeated, no further falling rocks appear in the game.

The Legend of Zelda: Spirit Tracks
In The Legend of Zelda: Spirit Tracks, falling rocks appear throughout the Fire Realm until the Fire Temple is completed. Ones that act like the ones in Phantom Hourglass appear throughout Goron Village and the connected Fire Sanctuary, as well as during the fight against Cragma. Additionally, large falling rocks appear on the Spirit Tracks, notably making them the only obstacle to be faced both on and off the Spirit Train. In this case, they fall to the ground, sometimes onto the tracks, and stay intact until destroyed by the cannon or by a Dark Train. Other enemies that are hit by them are instantly defeated. Sometimes, they may contain hearts and Rupees.

The Legend of Zelda: A Link Between Worlds
In The Legend of Zelda: A Link Between Worlds, falling rocks appear in Hyrule's Death Mountain as boulders that fall from the sky. When Link first arrives, they are shown being shot out from the top of Spectacle Rock. They usually fall near where Link is, and like normal boulders, sometimes hold large amounts of Rupees that scatter when they are destroyed.

The Legend of Zelda: Tri Force Heroes
In The Legend of Zelda: Tri Force Heroes, volcanic rocks fall in Blazing Trail and in "Avoid the volcanic rocks!" Drablands challenge. They are similar to the ones in A Link Between Worlds, but are on fire, thus burning Link.

The Legend of Zelda: Breath of the Wild
In The Legend of Zelda: Breath of the Wild, magma bombs are sporadically launched out of Death Mountain because of Vah Rudania, appearing primarily during Link's initial trip through Eldin to Goron Village. Vah Rudania had been causing trouble for the Gorons with them previously. Once Vah Rudania is freed from the influence of Fireblight Ganon, the magma bombs stop appearing.