It's a magic gauntlet that allows you to use spells, and you can perform a powerful punch with it too.
Zack is wielding an orange glove/claw/fist/gauntlet in which he can inflict huge amounts of damage, absorb energy and unleash devastating combos upon his foes. And because it looks cool LOL! I'll be happy to review
I believe that it's a mechanical energy gauntlet that the character Zack uses to defeat and eliminate the enemies. Protective, maneoveuring, combos and more!
The gauntlet is obviously magical and Zack uses it in combat to help defend himself and give him and edge in battle.
http://justanotheriphoneblog.com/wordpress/iphone-application-reviews/games-iphone-application-reviews/preview-com2us-upcoming-action-rpg-caligo-chaser-for-iphone new review for this, still can't wait for it to come out
His repulsor gauntlet which follows Zack since the start of his private-knight journey. With more experiences gained, Zack's gauntlet is able to tech up and upgrade to evolve new elementalal or magic abilities to face the tough enemies ahead.
pm sent in addition to posting here. his promise ring, which is hidden underneath the energy gauntlet. (the 1st post picture does have the words "PASSIONATE AND OUT OF CONTROL", so must be a love interest in there somewhere)