Reactant spells is my idea from my pervious game experiences. where certain spells react differently when used with different activators. there are many types I can think up but ill start out with a few basic ones Ice Fractal this spell is casted as a trap but once it casted it acts as a shield a small ice wall if a storm spell balance or life spell is use on it the ice wall breaks shattering and sending the fractals at the target doing greater damage then a basic trap
Gas field this spell is also casted as a trap but it acts as an aura the gas enrages the target for three rounds making them hit 20% harder with all spells but if hit with a fire, storm, or balance spell it sparks the gas making it explode for greater damage then a basic trap
Undead this spell is a basic negative blade if the enemy uses a one time healing spell it deals the amount of damage the healing would do. but only against npcs no pvp.
Zombie this is effectively undead but instead this one focus on healing overtime spells.
Jericho: this spell is unique its mainly built for NPC enemies if the foe has 5 or more Positive Shields of a similar type (i.e Multiple tower shields) that guard more than 45% this spell can be casted without failing. this breaks all the shields but instead shatters them throwing the shattered remains at the foe the greater the shields in play the greater the damage if the minimum 5 shields it does 800 damage and for every additional shield it does 100 more damage.
Ice Fractal this spell is casted as a trap but once it casted it acts as a shield a small ice wall if a storm spell balance or life spell is use on it the ice wall breaks shattering and sending the fractals at the target doing greater damage then a basic trap
Gas field this spell is also casted as a trap but it acts as an aura the gas enrages the target for three rounds making them hit 20% harder with all spells but if hit with a fire, storm, or balance spell it sparks the gas making it explode for greater damage then a basic trap
Undead this spell is a basic negative blade if the enemy uses a 
Jericho: this spell is unique its mainly built for