chakra
Chakra is ones inner energy.It is required for Most jutsu.Beside taijutsu and in some cases kenjutsu.It is channeled within the persons 361 tenketsu or chakra points.It is the moulding of ones physical and mental energy normally via handseals but their are cases where this isn't needed nor used.
Pure And Elemental Chakra
All shinobi have at least one elemental chakra affinity.Some have more or thanks to a bloodline limit can combine 2 elements to create a sub-element such as wind+water=ice or water+earth=wood release.In Narutobase however everyone has all elemental jutsu.And we have 2 affinities.A main one such as my lyanna's Water style which allows for 1 handed handsigns or my wind which allows for faster performing of the jutsu.Below is a elemental balancing thingy.
Fire (火, Hi) natured chakra allows for Fire Release (火遁, Katon), which is strong against Wind but weak against Water.
Wind (風, Kaze) natured chakra allows for Wind Release (風遁, Fūton), which is strong against Lightning but weak against Fire.
Lightning (雷, Kaminari) natured chakra allows for Lightning Release (雷遁, Raiton), which is strong against Earth but weak against Wind.
Earth (土, Tsuchi) natured chakra allows for Earth Release (土遁, Doton), which is strong against Water but weak against Lightning.
Water (水, Mizu) natured chakra allows for Water Release (水遁, Suiton), which is strong against Fire but weak against Earth.
Elemental jutsu/chakra can be channeled into weapons as well as ninjutsu or genjutsu to give different effects.
Pure chakra is chakra that is all around ourselves and can be absorbed by a person.It is within the air we breath and the terrain we alk upon.It is used commonly in senjutsu.
Nature Manipulation
Nature manipulation is made up of two types of manipulating chakra.Shape manipulation which controls the shape ,size and appearance of a technique and chakra manipulation.Used in pure chakra attacks such as genjutsu.
Handseals
are used to perform many ninjutsu, genjutsu, and other secret arts other than taijutsu. The exact amount of chakra necessary to perform a technique is manipulated through hand seals.There are different sequences of hand seals for every technique, requiring memorization. Shinobi can lower the number of seals needed to use jutsu.Most notable person who has done so is Tobirama senju and his water dragon jutsu which originally needed 44 handsigns but he got it down to a single handsign.