Here is the full list of items received as you level up on a Priest / Mystic.

Level 2 (Contains the following) :
50% XP Boost (1 Hour) x1
Minor Recovery Potable x20
Minor Replenishment Potable x20
Riding Skill: Flurryheart(7-Days)

Level 6 (Contains the following) :
Amethyst x1
Tier 1 Feedstock x100
Tier 1 Alkahest x100

Level 10 (Contains the following) :
Pearl x1
Tier 1 Feedstock x500
Tier 1 Alkahest x500

Level 16 (Contains the following) :
50% XP Boost (1 Hour) x2
Mirrored Shades
Goddess' Blessing x10

Level 22 (Contains the following) :
Expedition Healing Potion x30
Expedition Mana Potion x30
XXII Token x8

Level 27 (Contains the following) :
Ruby x1
50% XP Boost (5 Hours) x1
Bravery Potion x50
XXVII Token x8
Care and Use of Your Pet Viridette (Permanent Pet)

Level 34 (Contains the following) :
Fine Pounding Pentant x4
Fine Hardy Pentant x4
Goddess' Blessing x5
Divine Infusion x40
XXXIV Token x8
Tier 2 Feedstock x300
Tier 2 Alkahest x300

Level 38 (Contains the following) :
Sapphire x4
Riding Skill: Flurryheart(7-Days)
Fashion Coupon x400
100% XP Boost (1 Hour) x1
Goddess' Blessing x10
Traditional Bleakfields BBQ x15
XXXVIII Token x8

Level 45 (Contains the following) :
Experience Points (Level 40) x2
Major Recovery Potable x50
Major Replenishment Potable x50
XLIV Token x8
Tier 2 Feedstock x400
Tier 2 Alkahest x400
Goddess' Blessing x5
Experience Points (Level 45) x2
100% XP Boost (5 Hours) x1
Traditional Bleakfields BBQ x15
Swirled Sweets x15
Complete Crystalbinds x40

Level 50 (Contains the following) :
Emerald x1
Tier 3 Feedstock x400
Tier 3 Alkahest x400
L Token x8
Goddess' Blessing x10
Experience Points (Level 50) x3
100% XP Boost (1 Day) x1
Traditional Bleakfields BBQ x15
Lamb Bulgogi x15
Prime Battle Solution x15

Level 55 (Contains the following) :
Emerald x3
Fine Hardy Crux x4
Fine Pounding Crux x4
LV Token x8
LVIII Token x8
Tier 3 Feedstock x300
Tier 3 Alkahest x300
Goddess' Blessing x10
Experience Points (Level 50) x2
100% XP Boost (1 Day) x3
Traditional Bleakfields BBQ x15
Lamb Bulgogi x15
Prime Battle Solution x15

Level 60 (Contains the following) :
Emerald x5
Simple Purifying Brooch x1
Fine Hardy Crux x4
Fine Pounding Crux x4
Riding Skill: Nexus Warhorse x1
Tier 4 Feedstock x300
Tier 4 Alkahest x300
LX, LXIII Token x8
Goddess' Blessing x10
Instance Reset Scroll x3
100% XP Boost (7 Days) x1
Traditional Bleakfields BBQ x15
Lamb Bulgogi x30
Prime Battle Solution x30
Priest Specific :
Priest Bellicarium Glyph Box x10
Mystic Specific :
Mystic Bellicarium Glyph Box x10

Level 62 (Contains the following) :
Diamond x1
LX, LXIII Token x14
Instance Reset Scroll x5
Smart Dyad Structure x4
Priest Specific :
Sorrowspire (Permanent Weapon Skin) and Ornamental Robe (Permanent Costume)
Mystic Specific :
Spitestick (Permanent Weapon Skin) and Carminate Robe (Permanent Costume)

Level 64 (Contains the following) :
Priest Specific :
Longsweep (Guile Weapon) and Praiznee Robe (Guile Chest)
Mystic Specific :
Palmpinch (Guile Weapon) and Drivnee Robe (Guile Chest)
Cunningloves (Guile Gloves)
Slyppers (Guile Boots)
Guile Belt
Manor Necklace
Manorguest Earring
Manorborne Earring
Manorguest Ring
Manorborne Ring
Interhold Token x500
Superhold Token x80
Fine Hardy Niveot x4
Fine Pounding Niveot x4
Fine Relentless Niveot x4
Fine Savage Niveot x4
Fine Spiteful Niveot x4
Fine Focused Niveot x4
Fine Swift Niveot x4
Fine Brilliant Niveot x4
Fine Carving Niveot x4
Succoring Vyrsk x4
Swift Vyrsk x4
Grounding Vyrsk x4
Keen Vyrsk x4
Tier 9 Feedstock x200
Tier 9 Alkahest x200
Tier 10 Feedstock x500
Tier 10 Alkahest x500
Master Enigmatic Scroll x50
Spellbind x300
Semi-Enigmatic Scroll x10
Goddess' Blessing x15
Prime Recovery Potable x50
Prime Replenishment Potable x50
Noctenium Infusion x2,000