Talk:Upgrade/@comment-202.69.99.182-20130828150516/@comment-25560888-20150111054925

slime is more effective since several Ns cluttering your inventory is not good... and offering Ns to a, let's say, lvl39 SR will use up very high gold resource with each N used... slimes can swallow a number of Ns so it will save up space on your inventory and use those slimes for future instant max lvlups on your card... that gives Ns a purpose or else its only destination is become gold...

you will only hurt the potential of a card is you forgot to use arcana succession between evolutions... everything else is just optimal resource usage...

proper slime lvlup is another story hehe