Increase Gravity

Very common earth-based crowd control magic during the time of "The other one"; most experienced magic users had this in their bag of tricks at a low level of expertise at the very least.
By the time of redhead, wartime magic has fallen out of use (and been nearly forgotten). Nearly no one uses increase gravity, and exclusively uses gravity magic to aid in domestic projects (lightening the percieved weight of objects in construction, etc).

Effect

Depending on the skill and magic applied, this can make gravity increase either just a bit, making those in the affected area feel as though they are moving through syrup, or enough to crush those in the affected area into the ground.

Side/Secondary Effects

Higher level applications can damage the ground and surrounding area, leaving a crater.

Manifestation

The smell of magic depends heavily on the specialization of the caster, as each being's magic takes on the qualities of their favored element. For example, one specializing in the subcategory "lightning" would produce a scent of ozone when casting spells, regardless of the element of the spell being cast.

masuge-dǎo version of the poem:

「 xánǔa no gụo ò gheq
sáisò no gụodái-wa xenue sūiwēi-ga xáyi gheq
xaya no okukuka-ga sáisò-wa rá gheq

shiyan no qih-ga mezi gheq
xâyun no sūi-ga de gheq
tèkáin no kaeq-ga kaji gheq

jianjua-ga nakurèna gheq
jianjua-ga òrèna gheq
sáisò-wa hashin morá hasi gheq」

Gestures & Ritual

As with all magic, those unskilled with it must recite a poem in masuge-dǎo, the language of magic. This poem is very personal to each user, though generic versions exist (they are just far weaker). The poems are to assist in shaping their magic into the spell, and experienced users no longer have to do so (though some may as force of habit).
The translated generic poem during "The other one"'s time:

"Earth, tough and unmoving
Increase your pull
Like shackles to the earth"

One known personal poem is translated as such:

"The persistence of earth endures,

Its pull affects even distant moons.

One crumbles in the face of such might.

Lithe air slows,

Swift water is constrained,

Agile fire is extinguished.

You cannot withstand it.

You cannot endure it.

It is divine punishment."

The ending "You cannot withstand it / You cannot endure it / It is divine punishment" is a common conclusion to poems invoking more powerful spells that effect the caster's surroundings.