"Perma stun" in Atlantica is when your opponent is kept under severe stun for the entire match. This can be done in a number of ways.So I brought this guide here from other site to help some guys,hope it will be useful.

1)Mana seal: This makes it so you need 1 less counter to screw your opponent over. If you have the opponent at combo 2, you can use mana seal to prevent an awakening, forcing stun. This forces the enemy to awaken at combo 1, which gets tedious at some times. Eventually, your enemy will slip up and let you have that combo 2. When that happens, lay on the mana seal. Your opponent will be stunned next turn.

2)Lightning Spear: This is done by using Lightning Spear. By doing this, you deprave the monk from having enough AP to have an activation, making it so that he can’t awaken. This can be used as a makeshift mana seal, or it can be used in combination with it to force a stun starting from combo 1.

3)Forcing Holy Guard: This cancels out magic, making it so that you can’t target the enemy with magic. This is useful for countering things like DOTS and AOES. However, when you do this, you cannot awaken the Holy Guarded units. Also, it takes up immense amounts of AP, Atlantica Gold and it is not often used by people who are trying to keep the stun counters off. What you do here is do something that forces your opponent to use Holy Guard.

That means that he most likely did not awaken, allowing you to get combo 2 and your stun, eventually. A Holy Guard can be forced by using magic against your opponent. Usually, DOTS like Ravaging Melody (for musician mains) are good to force holy guard, as they do so much damage. Also, freezing the front row may get your opponent to use Holy Guard, if they want to use their frontline units. Other “annoying” magics include: Freezing atmosphere, War Cry, Toxic Sword, Smoke Bomb, Freezing Axe, Hell’s flame (combo with shaman and swordsman,) Vortex, and others