Second First-level Spell!

Merlin had a total of six spells. Before he left the Dark Magic Region, Wizard Leo had given him all necessary First-level spells. Thus, he did not lack in First-level spells so he would need to make a good choice as his second First-level spell.

Merlin's first First-level spell was Earth-type Defensive spell, Guardian Monument. This spell had indeed helped him tremendously. If he did not possess Guardian Monument when he fought against the Spell Casters recruited by Longardi, he could never be able to stand against Wizard Heghar's Second-level spell attack with just Earth Guard.

After having a Defensive spell, Merlin thought that his Offensive spells were less powerful. After all, neither Fireball nor Thunderbolt Net could break through the defense of some First-level Defensive spells.