wow... all your limits sound good but too overpowered...
mine are as followed:

Level 1:
Double Slash (like the - I run to an enemy and slash the enemy twice (with my medium sized katana) for double damage.
Moment of Peace - I dig my katana into the ground in front of me, three "streams" of green light (lifestream) emit out, curing the entire party for 1/3 health.

Level 2:
Ninja's Death - I raise my sword, point it at the middle of the enemy group, then multiple ninja stars (4 per enemy) hit the enemy for non - elemental normal damage.
Group Revenge - I raise my sword, red streams of light flow out towards my body as well as allies, then we all rush foward, attack at the same time (normal damage), and gain the same amount of HP that damage has been inflicted - regardless of enemy type (therefore ignore weapon elemental and if enemy is undead). (If more than three enemies are present, illusions of myself appear [number = enemies more then three] and also attack the enemy, however they don't gain HP (obviously) and disappear once limit breaks is over)

Level 3:
Elixir of Life (possibly most useless of my limits) - can target either single ally (or myself) or single enemy. Similar to Moment of Peace however only affects single ally (the green stream's of light hits the ally or myself instantly bringing them back to life [if they are dead] with max health and mp] or hits undead enemy for 9999 damage.
Anger of the Planet: Green streams of light comeout of the ground, surround me, then I run to a single enemy and attack for around 5 times - normal damage. (Each hit results in me gaining 50 mp regardless if enemy has any MP or not)

Level 4 (therefore my most broken limit):

The Trial of the Illusions (combination of Moment of Peace and a new limit) - I dig my katana into the ground in front of me, three "streams" of green light (lifestream) emit out, curing the entire party for 1/2 health and 1/2 mp as well as curing any status ailments, I take back my katana as illusions of me form (number of illusions formed = number of enemies - me), then the illusions and me run to the enemies and attack them for 10 times (each attack doing double non - elemental damage).

P/s: I tried not to overpower my limits (except for The Trial of the Illusions).