So in late game, there is a lot of time to change and play with new spells, even if they might end up getting you killed. So I decided to show off some of my more favorite and useful spells.
(Note, I'm in new game 13)

For all of these spells, it should be noted that I am using Harpy Feather, Diamond,
2 Owlbear Traps and 3 Tonna bricks on my robe.

Recently I started making a few spells for killing the bosses either really quickly or one shot.
The first one I use (all A grade) Optic Lens, 2 Fairy Wings, Soul Contract, Sundial, and 2 Green Belts. Spell is Enchanted. For this spell, you need to make sure you are standing on the ground as to not reset your Owlbear Traps and should take the boss out in under 3 seconds.

Next, a spell I created based off looking cool and doing damage. You'll need, all A grade, Illusion Dust, Crystal Ball, Bouncy Ball, Diamond, Spider Silk, Extract of Monday and Caustic Ichor. No enchating here. Just throw it at the ground, and assuming you're fighting the boss, after you've killed the basic enemies, it will home in and keep piercing it till it's dead (the boss).

Now for killing an entire room, sure you can use something with a Diamond and Crystal Ball, but where's the fun in that? So, this spell uses (all A grade) Illusion Dust, Bouncy Ball, Phil. Stone, Diamond, Seashell, Spider Silk and Soul Contract. If you are on a sand level, this works great in the closed in space of the underlevel, allowing for this spell to bounce all over and destroy everything in your path.

Of course, where would we be without the good ol' nuke spell. A spell that can kill the Dummy with 100K health several times over. As always, A grade on everything, starting with Crystal Ball, Seashell, Tonna Brick, Vulcan Wrench, Spider Silk, Extract of Monday, and Chaos Butterfly. When this homes it, know for sure that the boss that you were just fighting will be dead in a matter of seconds.

Don't judge a spell on the surface. This spell is so nice it does a whole 1 damage! You need A grade everything as usual, starting with Optic Lens, Phil. Stone, Quicksilver Gear, Soul Contract, Caustic Ichor, and 2 Green Belts. Just use it for a bit and you'll see why it's fun to be able to do that kind of damage.

Optic Lens is one of my favorite componets to try and get to put out damage without doing anything cheesy (Diamond, Spider Silk, Seashell, Illusion Dust, Rock, and Vampire Tooth). This spell is for killing all the pest. (A grade everything) Starting with an Optic Lens, 3 Fairy Wings, Diamond, Quicksilver Gear, and Soul Contract. This spell does a lot of damage quickly, as to make up for the low damage of 235.

Every Mage in this game starts out with the fireball spell, so of course, later in the game I couldn't help myself but go back and make a stupidly powerful fireball. For this spell (Like always, everything is A grade), if you actually want to aim, you can use 4 fire crystals, but I use 3 Fire Crystals, a Crystal ball, 2 Phil. Stones, and Soul Contract. This spell will be Enchanted. The fire will spread through a level very quickly if the enemies are packed really close together.

Along with the fire theme, I made a spell that is a sun. A literal sun. It uses (All A grade) Ninja Sword, Diamond, Soul Contract, 3 Miniature Suns, and an Owlbear Trap. Just fire this baby off with the Miniature sun as the icon for it and you get your pretty sun. ENCHANT THIS FOR BEST EFFECT!

The least exciting I left for last and that is what I always use for my wand, outside of the Jungle Levels with the unkillable boss (The one you have to trap).
For the normal levels you will just use 5 A grade Rift Crystals and 2 Fairy Wings, enchanted, and for the Jungle Levels you use it as a spell.

On Jungle Levels I use a wand that works for completing the "puzzles" really easily. A grade all, Optic Lense, Evercold Ice, Seashell, Rock, Fire Crystal, Spidersilk, and Chaos Butterfly enchanted.

Hope you all enjoy! ^o^/