Reincarnated Lord: I reincarnated with an SSS rank skill

After falling off a cliff and dying, Draco got reincarnated in a fantasy world as the last son of a king. A world where there is constant wars between kingdoms, and nightmarish creatures threatens the people in the kingdom. Luckily, Draco got a golden finger. A system that grants him the ability summon dead creatures and upgrade them to an SSS rank.

[Congratulations, you have summoned an F ranked Nightcrawler]
[Will you like to upgrade it to an SSS rank?]