Charms are collectibles in Skylanders: Giants. There are eight charms in total. They can be purchased from Auric or by beating Brock's arena battles. Each one has special powers.
Charms also made a reappearance in Skylanders: Swap Force where they can be purchased at Tuk's Emporium. However there are many more available than in Giants and all now have more minor effects on gameplay.
List of Charms in Skylanders Giants
Below is a list of all of the collectible Charms in Skylanders: Giants. The order in which they are listed is the same order in which they are listed in the Charms Collection screen; they are not listed by effectiveness or potential usefulness.
If an enemy is affected by more than one of the damage-enhancing Charms, the effects of the Charms to not stack. No matter how many Charms may affect a single enemy, the damage boost is still the same.
Skylanders are much more likely to block an incoming attack when at low health
When a Skylander's health is at 20% or less of its Max Health, it has an increased chance of nullifying all damage taken from an attack with Armor. Oddly enough, this also seems to affect medium- and large-sized enemies as well as Skylanders.
Clearing the last Arena Challenge, "The Perfect Game", in Brock's Rump Roaster Ruckus.
Skylanders are much more likely to score a critical hit when at full health
When a Skylander's health is equal to its Max Health, it has an increased chance of dealing Critical Hits to enemies.
Clearing the last Arena Challenge, "You Only Live Once", in Pipsqueak's Mincemeat Mayhem.
Giants can lift bombs and boulders more quickly
Less button presses (or remote-shakes, in the case of the Wii version) are required to pull up a large boulder or bomb from the ground with a Giant Skylander. Under the effect of this Charm, the lifting of these objects can occur almost instantly.
Must be purchased for 900 gold from Auric's Shop on the Dread-Yacht after clearing Chapter 5.
Skylanders regain more health from eating food
From collecting regular food items, Skylanders receive over 75% more health than usual.
Clearing the last Arena Challenge, "One Shot Thrill", in Kaos' Royal Flush.
Must be purchased for 25000 gold from Auric's Shop in Chapter 14.
Skylanders heal faster while in an Elemental Area that matches their element
Inside gated elemental areas, Skylanders of the same element as the zone heal faster than usual. Instead of 5 health every 4 seconds, Skylanders regain 20 health every 4 seconds while they are in these zones.
Must be purchased for 400 gold from Auric's Shop in Chapter 3.