For Those who are having a bad time on choosing what particular seeds to buy on webshop, Here is the guide =)
Fire +0 = (Level Type) Attack/Wizardy Damage Increase
Fire +1 = Attack Speed Increase
Fire +2 = Maximum Damage Increase
Fire +3 = Minimum Damage Increase
Fire +4 = Attack/Wizardy Damage Increase
Fire +5 = AG Cost Decrease
Lightning +0 = Excellent Damage Increase
Lightning +1 = Excellent Damage Rate Increase
Lightning +2 = Critical Damage Increase
Lightnint +3 = Critical Damage Rate Increase
Ice +0 = Hp After Killing Monsters
Ice +1 = Mana After Killing Monsters
Ice +2 = Skill Attack Increase
Ice +3 = Attack Success Rate
Ice +4 = Item Durability Increase
Hope this will help you. Thanks =)