Thanks to Kenneth DeWolfe for help getting this information... some of it may be wrong, notify me if you notice any mistakes.

ARCHAIC LEAF = raises skill by 10
ARMOR ORB = raises defence by 12
BAG OF BONES = raises attack by 8
BARK THIMBLE = raises defence by 4
CHANNELED GEM = raises skill by 6
CORF PEARL = attack down by 15, skill up by 15, resist up by 15
CRIMSON VOID = strength up by 6, defence down by 10, skill up by 6, resist down by 10, luck up by 20
EARTH'S AURA = speed down by 25, defence up by 20, resist up by 10
END BRINGER = raises all stats (except luck) by 25, kills the DC after 3-4 turns
ENERGY GEM = raises energy in battle (after being summoned at normal level) by 6
FLAME AURA = defence down by 15, strength up by 15, resist down by 15, skill up by 15
FLAME ESSENCE = makes your creature strong against earth, weak against shadow
GEM OF NAROOM = defence up by 5
GOLDEN CLOVER = luck up by 15
GRAIL OF LIFE = raises energy in battle, after normal summoning amount by 4
HYREN'S CLAW = raises attack by 5
LEAF ESSENCE = makes your creature strong against shadow, weak against water
LUCENT BELT = raises skill by 10
MAELSTROM = raises attack by 12
OMBORS AMULET = raises resist by 10
PHANTOM WIND = raises attack by 10, speed by 10, skill by 5
PINCH OF LIFE = attack down 15, defence up by 15,
RABBAGE FOOT = gets rid of all luck
RAGE STONE = raises speed and attack by 2
SHADOW VEIL = defence up by 20, resist up by 20, causes confusion
SHIELD ORB = raises defence by 15
SKY ESSENCE = makes your creature strong against water, weak against earth
SPICE OF LIFE = raises energy in battle after normal summoning amount by 8
STONE ESSENCE = makes your creature strong against wind, weak against fire
STONE OF DOOM = causes bad status effects
STONE OF LIFE = raises energy in battle after normal summon by 8, protects against bad status (it won't stop end bringer's erupt, the thing that kills your dc after 3-4 turns, so don't even try, it is a waste of time)
SWORD OF WIND = raises attack by 15
TIDE ESSENCE = strong against shadow, weak against water
TITAN RING = raises attack by 8
WATER ORB = speed down by 5, all other stats up by 5 (except luck), causes hiccups
WISH BONE = luck up by 5