Not SuckoTrances
Based on Element, not Terrain

Fire (Lava, Beaches, HOT PLACES)
Ice (Snow, Tundras, COLD PLACES)
Electric (Electric grids and thunderstorms)
Wind (Plains and windy places)
Water (durr im a hurr)
Earth (Mountains/Caves/Towns/Forests ect)
Holy (Hallowed Ground)
Shadow (Not so Hallowed Ground)

Offensive:  Offensive are just a normal Weapon Attack that does +2 steps of dmg if you got the associated weapon-touch.  They do Arm damage of the element you chose.

Defensive:
Fire - Spirit Burn! force vs force, Lower a Resistance or Immunity one stage!
Ice - Frozen Armor! Allies gain Level * 3 ARM
Electric - Kinetic Armor! Allies gain Level * M. ARM
Wind - Warm Winds! Restore Force * Level HP to all allies.
Water - Warm Waters! Restore Finesse * Level MP to all allies.
Earth - SPIRIT BEAR. Cure the target of a Status Effect.
Holy and Shadow - Spirit Boon! Give a target a Resistance to an Element!


Maelstrom: Just are normal crits that also put down an elemental field of the type of the trance you used.