Royal Ghost is a low HP mini but has a powerful super to make itself invisible, avoiding enemy attention while still being able to attack. At higher level, its super becomes a clash that also makes nearby allies invisible.
Skill: Ghost Army!!
"Clash: Grant invisible to nearby allies for 3s"
Untargetable by enemies, but can still take damage from area attacks. Royal Ghost is still able to attack when he's invisible.
"Attack deal 1 bonus damage to isolated enemies Isolated: No ally nearby"
"Gain Invisible for 2s after attacking 3 times"
Makes your allies next to the Royal Ghost invisible at the start of the turn.
"Boast: Heal 6HP over 3s Boast: After defeating an enemy"
Stats by Star
Damage per Hit
Hit per Second
If upgraded to have the clash ability, you can make 2 other allies invisible at the start of the fight as well. If all your allies are invisible, all enemies won't be able to attack anyone and just stand still while your team can attack until the invisibility is over.
If you have more than 3 allies, making your frontlines invisible can serve as a way to block or stall your opponent from going into your backline since they have to go around your invisible units.
Even though the Royal Ghost can go invisible, it can still take damage from area attacks like from Valkyrie, Magic Archer, or Wizard's attacks since they can deal damage in an area. If your opponents use units like these, you'll want to make sure to separate your Royal Ghost from your allies to avoid splash damage.