Tinder

Location
Tinder is located in Hesperia Settlement in the far western region of Hesperia. Cast Growth on the plant to the left, then at the top of the area where there is a wooden crate, push it off the left hole in the fence below. (Note that it is possible to push the crate off the right hole so that it drops onto Tinder and traps it, causing the box to shake similar to what can happen in Kibombo Mountains; you'll have to leave and reenter so that the puzzle resets itself if that happens, though.) From there, press the box right so that it falls further down, then use Move while standing below it to move it one step further right. You are now able to hop onto the top of the box and reach the series of wall ladders that connects to Tinder's ledge, as well as the cave on the opposite side containing a chest with 166 coins.

Description
When Set, it increases base HP by 12 and base PP by 5.

When Tinder's battle effect is used, a targeted downed Adept is surrounded by a particularly elaborate visual of glowing red holographic images of avian pinions falling onto the target. The down Adept is revived and fully cured to maximum HP without any inaccuracy, just as though it is the Revive Psynergy without the PP cost. It is an upgraded version of Spark and similar reviving Djinn from the original Golden Sun.

Ability analysis
Tinder is easily the best of the Djinn in the series that revives a targeted Adept, for the simple reason that Tinder does all of what it is supposed to without any strings attached. It is far superior to the Mars Djinni Spark and the previous game's Venus Djinni Quartz because those only have a chance to revive the targeted Adept, and when they do their HP-restoration rates are merely 60% and 50%, respectively. Tinder is better even than the equally accurate Mercury Djinni Dew from the first game, because that revives to 80% restored maximum HP. Tinder therefore emulates the powerful effect of the Revive Psynergy, and is good to have on an Adept that does not have the Psynergy or Water of Life items. The only other reviving Djinni that can possibly be considered alongside Tinder is the Mercury Djinni Balm, though, because its reviving effect has a chance to hit all currently downed Adepts at once.

Name Origin
Tinder is easily combustible material used to ignite fires.