This guide lists all the effects from Towers in Chronicles of the Sword when battling inside. This guide was made by Buster Wolf.

Poison

Looks like: Fighter glows green.
Does: Lose life as time passes.
Works on: Both fighters.
Chronicle it's in: Tutorial, 3, 5, 7, 9, 10, 12, 14, 16, 19.
Note: Weapons that regain life overtime can combat this and make it possible to get a perfect, weapons that lose life overtime make this worse and you'll lose life faster.

Defense Down

Does: Defensive power is lowered.
Works on: Side not controlling the tower.
Chronicle it's in: 2, 4, 5, 8, 12.

Minus Guard

Looks like: Fighter glows green while guarding.
Does: Lose life while guarding.
Works on: Both fighters.
Chronicle it's in: 3, 5, 7, 9, 17, 19.
Note 1: In Chronicle 9 if you aren't in control of the tower with this effect it will work on you, but not the opponents.
Note 2: In Chronicle 17 this works on you, but not Eurydice.

Whirlwind

Looks like: Fighter gets pushed away.
Does: Increase pushback power.
Works on: Side not controlling the tower.
Chronicle it's in: 4, 6, 8, 13, 16, 18.

Cure

Looks like: Fighter glows green.
Does: Heal as time passes.
Works on: Side controlling the tower.
Chronicle it's in: 4, 5, 6, 8, 12, 13, 15, 19.
Note 1: In Chronicle 12 the tower with this effect will heal both fighters.
Note 2: In Chronicle 13 regardless of who controls the tower both fighters will gain life back.

Quake

Looks like: Announcer will countdown from 3.
Does: After 1 if you are standing you may be damaged (usually happens most when you are almost dead) and will be stunned.
Works on: Side not controlling the tower.
Chronicles it's in: 6, 14, 15, 17.
Note 1: To avoid this you must either jump, crouch guard (must guard or it will still go through) or stay in the knocked down state.
Note 2: In Chronicle 14 when this is under your control it will effect both fighters not just the enemy.

All Guard Break

Looks like: Weapon will have Blue lightning.
Does: All attacks will have guard break property.
Works on: Side controlling the tower.
Chronicles it's in: 6, 8, 12, 13, 14, 16, 19.

Ice

Looks like: Blue ripples at the fighters feet.
Does: Continually slide after a movement.
Works on: Side not controlling the tower.
Chronicles it's in: 6, 7, 8, 10, 17, 19.

Offense Down

Does: Offensive power is lowered.
Works on: Side not controlling the tower.
Chronicles it's in: 7, 9, 10, 13, 19.

Glue

Looks like: Fighter gets pulled in.
Works on: Side not controlling the tower.
Chronicles it's in: 7, 8, 13, 14, 17, 19.

All Unblockables

Looks like: Weapon will have fire burning.
Does: Attacks can't be blocked only Just Impacted.
Works on: Side controlling the tower.
Chronicles it's in: 9, 13, 15, 17, 19.

Power Up

Chronicles it's in: 10, 12.
I have no idea what this effect does since I've yet to fight in a tower with it.

Aerial Wind

Does: Juggles last longer, hits in a juggle do more damage.
Works on: Side not controlling the tower.
Chronicles it's in: 10, 13, 19.
Note: In Chronicle 19 juggle time is extended outrageously a 3B from Ende will have you airborne for 5+ seconds.

Cruel Sword

Does: Smash + All Unblockables.
Works on: Side controlling the tower.
Chronicle it's in: 11.

Sacred Field

Does: Ice + Heal.
Works on: Side controlling the tower.
Chronicles it's in: 11.
Note: Ice works on you, Heal works on Heal-Do.

Holy Wings

Does: Whirlwind + Aerial Wind.
Works on: Side not controlling the tower.
Chronicles it's in: 11.

Impregnable

Does: Quake + Guardian Force.
Works on: Side controlling the tower.
Chronicles it's in: 11.
Note: Quake works on you, Guardian Force works on Aege.

Reserve Offense Up

Does: During Decisive Battle fighters that go 2nd-5th will have increased offense power, increasing more the farther they are on the list.
Works on: Both sides.
Chronicles it's in: 11, 13, 14, 16, 18, 19.

Paralysis

Looks like: Yellow electricity on the weapon.
Does: All attacks will stun.
Works on: Side controlling the tower.
Chronicles it's in: 12, 15, 18, 19.

Separate

Looks like: Fighter gets pushed away.
Works on: Side not controlling the tower.
Chronicles it's in: 13, 15, 16, 18.
Note: In Chronicle 15 if you are in control of the tower with this effect it'll work on both fighters not just the enemy

Smash

Looks like: Sparks on the fighters body.
Does: Extra damage when hit, increase Push back power against the controlling side.
Works on: Side controlling the tower.
Chronicles it's in: 14, 15, 17, 19.

Guardian Force

Look like: Fighter glows fiery Red.
Does: Won't flinch from attacks and can't be thrown.
Works on: Side controlling the tower.
Chronicles it's in: 15, 18.
Note: To make the enemy flinch from attacks you need to do an attack throw, Guard Impacts won't work unless it's an effect on your weapon which you have to be guarding beforehand.

Down Lose

Does: First to get in a knocked down state loses.
Works on: Both fighters.
Chronicles it's in: 16.

Coin Collector

Does: Battle turns out like the Soul Arena Mission Coin Collector you will get money equal to 10 times the amount of coins you collected (not sure, but that sound right).
Works on: Both fighters.
Chronicles it's in: 17, 19.

Mad Struggle

Does: Offensive power is increased dramatically (about triple the original).
Works on: Side controlling the tower.
Chronicles it's in: 18, 19.

Cure Sapalete

Chronicles it's in: 19.
If Tomoe would stay in this tower I would get an idea of what it does…probably Cure on the controller & Poison on the opposing…that's just a guess.