The mage can combine up to 5 elements of various types to unleash devastating blasts, enchantments on others, or themselves, or unleash massive AoE blasts (AoE blasts do not hurt the caster). Some elements do not play well with others, and when they are combined, they will cancel each other out. Elements will follow the below rules before deciding to stack.

Water and Lightning cancel each other out
Earth and Lightning cancel each other out
Life and Poison cancel each other out
Life and Arcane cancel each other out
Fire and Cold cancel each other out
Water and Cold makes Ice
Water and Fire make Steam
Water and Life make Poison
Steam and Cold make Water
Ice and Fire make Water
Defensive Magic cancels itself out

Spells will take the effect of either a Shield, a Beam, a Blast, a Chain, or a Stream when channeled by a blast. Below is how the blast spell will be formed in descending priority.

If Defensive magic is involved, the resulting blast will be a shield
If Earth or Ice are involved, the resulting blast will be a blast or boulder (Or in the case of Ice, a machine gun)
If Arcane or Life are involved, the resulting blast will be a beam.
If Lightning is involved, the resulting blast will be a chain (lightning)
Any other blast without these elements will be a Stream, or a small cone of effect like a flamethrower.

Each element has its own effect, and the more elements put into a blast, the more powerful the blast or beam will be. Remember there can only be 5 elements in a blast. Ice, Poison, and Steam count as 1 element, even if it takes 2 elements to make them.

-Fire does what fire does, sets things on fire. It also adds quite a bit of blast radius to things that explode. If cast as an enchantment, it'll dry you off, warm you up, or set you on fire, depending if your wet, chilled, or not.
-Water is water. It does no damage but makes things soaking wet. It also has a lot of pushing force behind it.
-Cold lets you chill things. It does a small amount of damage and chills things, or freezes them if they are already wet. Chilled objects move much slower, while frozen things are well, frozen.
-Lightning doesn't mix well with water and trying to invoke a lightning element while wet will damage the user. Lightning does a ton of damage and does twice as much damage to anything thats wet.
-Earth, or rocks, lets you fire powerful boulders at things that need some time to charge up if you want to launch it with lots of force. It also acts as a great anchor for columns, makes great armor, and causes the earth to quake if used as an AoE.
-Arcane, or the energy of death, is extremely harmful to living things, but can heal the undead. Any living thing killed by Arcane energy tends to explode violently, and while they are having Arcane energy channeled into them, they tend to slow down as they start to puff up as if inside a microwave. Any spell with Arcane will heal the undead.
-Life is pretty self explanatory. It heals living things and deals damage to the undead. Any spell with Life in it will heal the living and damage the undead. Although if it has fire or water or cold involved, the spell might leave the target on fire, wet, or chilled/frozen.
-Steam is a combination of Water and Fire that can be combined with lightning. Its what it says, superheated water that can leave the target both wet and on fire.
-Ice is frozen water. It acts much like Earth and forms projectiles, but instead of them being boulders they're shards of ice. It can be combined with Lightning, but electric ice isn't very effective.
-Poison is what it says, it poisons things. Poison fire or Poison lightning though sound really, REALLY nasty.
-Shield, or Defensive magic, greatly changes the properties of spells. Most offensive spells will now be tied to a column (If using Rock or Ice), mines, or can be used as enchantments to give various shields or barriers that can protect you from stuff such as being Wet, Chilled, Poisoned, Set on Fire, damage from any of the elements used to make the shield, or just a straight barrier if cast by itself. Be careful when conjuring an elemental shield on yourself. Sure Rock and Ice armor will greatly protect you from physical damage, but it'll also slow you down. Mines and Columns will detonate on or hurt anyone nearby and will expire if a second set is cast, and making yourself immune to Life elements means no healing unless you dispel the shield.

Elements can be used a specific way to cast actual magic instead of casting blasts. Many magics can be used to buff the caster or their allies, but any buff on an ally could be intercepted by an enemy. Same with any spell that deals damage to an enemy, an ally could just as easily be hit. Most weather and storm effects last for only 30 seconds.

Blizzard - Summons an extremely strong blizzard that leaves everyone chilled and drastically reduces visability. Tends to contain hail.
Chain Lightning - An even stronger version of the Lightning element that will keep on chaining until there is nothing living nearby to complete a circuit.
Conflagration - Sets anything in front of the mage on fire, even if underwater.
Confuse - Confuse enemies, leaving them disoriented.
Corporealize - A spell that makes all nearby ghosts become physical and be able to hurt by physical means.
Dragon Strike - Summons a few small meteors imbued with dragonfire that fall to earth, hitting the target location.
Eruption - Summon a small volcano that oozes lava and sometimes shoots out volcanic rocks.
Fear - Instills fear in anything in front of the mage.
Geyser - Summons a powerful water geyser that shoots out powerful water.
Grease - Summons a puddle of grease that is very difficult to walk on and is very flammable.
Haste - Drastically increases the speed of the mage or an ally.
Holy Blessing - Summons an ancient statue that slowly heals anyone around it.
Invisibility - Turns the mage or an ally invisible
Levitation - Allows the mage to levitate themselves or an ally for a short time.
Meteor Shower - Summons a massive volley of meteors in an area around the mage. Make sure to take cover!
Mighty Hailstorm - Summons a mighty storm of hail. They're the size of baseballs!
Nature's Call - Summon an old drudic tree that tends to not like it when anyone gets close, attacking them. At least it comes paired with two imps that'll fight for a short time.
Nullify - Cancels all spells and effects on the caster and anyone else nearby. Including weather effects such as Meteor Shower, Thunderstorm, ext...
Portal - Can summon up to two portals that link to each other, allowing instant travel between two spaces. Don't be stepping inside one when the other is closing though...
Plasma - Summons a ball of plasma that tends to be very unruly and while it does move forward, it tends to change its trajectory a lot.
Rain - Summons a rainstorm that leaves everyone wet and soggy.
Raise Dead - Raise two skeletons to fight for the mage. Or zombies, if there are fresher corpses nearby. They also tend to fall apart fairly quickly. Rotting flesh or no flesh tends to do that.
Stone Prison - Encase something in a prison of stone. Tends to be super hard to break out of.
Summon Elemental - Summons a dormant elemental that will take on the elemental affinity and be under the command of whoever gives it an element first. Tends to not last all that long.
Summon Phoenix - Summons a fire bird that tries to burn everything around it as it flies. When it dies or burns out, it falls to the ground, healing anything in its dying flames.
Teleport - Teleport a short distance.
Thunder Bolt - Summons a single thunderbolt that strikes the tallest object.
Thunder Storm - Summons a mighty thunderstorm that strikes the ground with lightning bolts every few seconds. Don't be standing in the lightning!
Tidal Wave - Summons a tidal wave that washes away things it crashes into. Not big enough to topple buildings, but it can carry lighter cars.
Time Warp - Warps the flow of time inside a bubble, causing everything inside it to move slower.
Tornado - Summons a small tornado that does tornado things.
Vortex - Summons a vortex that sucks in things nearby.