Huh, a dream...!
Looks like you were having a nightmare, or was it a nice dream?
Nothing about those even make any sense! Getting back on topic... You need a duplicate card of a
Heroic Spirit to strengthen their Noble Phantasm, which can be upgraded to a maximum level of 5.
There are various ways to raise your Heroic Spirits; Ascension increases the maximum level of your
Servant and unlocks a new skill, while Skill Enhancement will strengthen the effects of those skills.
Find other ways to raise them that benefits you more in battle.