Uhh... all of them?

A magical barrier stops the acid and silk that fly towards Kefka he waves his hand and the floor is covered in fire as hot as lava and he holds up his other hand. "the itsy bitsy spider GOT CRUSHED BY MY MAGIC!" Above the spider daedra a giant block of ice with spikes preturdng from it falls. "hehehehehe if i could take out espers which are five times larger and stronger then your spiders with a flick of my wrist, what makes you think im scared of these things? OH I KNOW! how about i summon my favorite esper? IFRIT SHOWS THESE PATHETIC WORMS THE WAY TO HELL!" the floor splits and a large demon comes out of the ground and everytime it exhales a small amount of fire escapes from its lips. "HEHEHEHEHEHE lunch time my pet."
http://images.wikia.com/finalfantasy/images/0/02/Ffviii-ifrit.jpg

Wesker vanishes out of the way of the ice spell and does a power spin kick aimed at the monsters head "I have fought things twice the size of you and won with out breaking a sweat. even if you have magical powers you are nothing." After he lands on the ground he pulls out his powerful magnum and fires a clip into the monster and reloads.

"Oh that HURT! Please, little human! No more!" the Atronach mocked as the bullets ricocheted off of its icy body. "BAHAHAHAHAHA! Let me show you how it's done, mortal!" The Atronach stomped on the ground and gigantic spears of ice burst from the ground and directly at Wesker.

"Flame Atronachs, send that beast back to wherever it came from!" Vivec ordered, pointing at the Ifrit. "In the meantime...." he whispered, and began to pray...

Wesker seeing that high calibur .45 rounds arent enough "how interesting, normally these bullets split concreate, very well i suppose my own strength will suffice." He vanishes from the path of the ice spears and appears behinde the monster and grabs the monster and lifts it with one hand. "prehaps i should let you know before end your pathetic exsistance that I, Albert Wesker am not a human." He slams the monster into the ground denting the floor and then does a viscious downward kick that creats a even larger crater. "hmph."

Kefka looks at the flame atronachs. "hehehehehehehehehe even though they are made from flame this coming attack will wipe them out IFIRIT YOU KNOW WHAT TO DO! WAAAA HAHAHAHAHAHAHA oh one other thing dont worry about the flame guys if you dont kill them i can handle them take out the rest of his "Friends" SHOW THEM YOUR HELLFIRE!"
Ifrit lets out a breath and a flames escape from his mouth and the flames form a ring in front of him. Ifrit begins to levitate and is engulfed in a bubble of flame and he flies through to the other end of the chamber leaving a trail of fire on the ground that creates large explosions "WAAAAHAHAHAHAHHA PERFECT! SIMPLY BEAUTIFUL IFRIT!"

The Flame Atronachs stood where they were, not only completely unharmed by the Ifrit's attack, but also looking even healthier, with brighter flames shining from them. "It is impossible to harm a Flame Atronach with fire, Kefka, just as it is impossible to harm a Frost Atronach with ice and a Storm Atronach with any form of energy. Attempting it simply heals them and replenishes their magicka." Vivec said as a light shone beside him. "I didn't want to have to do this, but I'm afraid it was necessary to call upon the ancestors for aid as well." Several undead creatures stepped forth from the light. First marched forward a greater Bonewalker, an undead golem of flesh, bone, and magicka. Next, two hooded figures with four arms each floated in. Finally, several skeletons marched in, all bearing different weapons. "This power comes not from my divinity, but from my race, the Dunmer. We are all guarded by our ancestors subtly at all tmes, but they come to our aid directly when we ask them to."

kefka snarls "grrrrr IFRIT blow away the undead ones, undead are weak to flames." in Ifrit hands two large fireballs grow, he throws them and they explode nto a firery inferno around the undead. "BURN BURN BUUUURN! now for those flame astroids or whatever they are." he uses blizzaga and snowflakes float around his hand and a ball of ice grows and he rolls it along the ground "FA-REEEZ!" as the ball of ice rolls along the ground it leaves a path of ice on the ground towards the flame monsters it explodes and shards of ice pirce the monsters. "where is that other guy? why isnt he fighting against his own enemy? oh well more fun for me."

As Goku teleports back in he is shocked by all the commotion. "Hey guys, I got those other two into a safe spot, they will remain untouched."

Yugi has been paralyzed in shock by everything but got his act together. "I summon The Dark magician and Dark magician girl!" Two people who looked like normal humans, except taller and with staffs. "They have exceptional magic power!" The two magicians put their staffs together and a stream of black and white light fused together from the two staffs, creating an exceptionally powerful beam. They fired it together, strait at Kefka.

Kefka gets hit by the beam and his body begins to fade

Wesker watches from the window "how pathetic brought down by beings with in the card, some god he was."

a voice behinde wesker "whos pathetic? who got brought down by trading cards? Kefka looks over wesker shoulder "STOP BLOCKING THE VIEW MISTER! i wanna watch! OH they must have beaten my illusion oh well, better it then me."

Wesker pushes kefka away "your voice annoys me." wesker looks at the control panel for the room. "oh my, whats this? a button that fills the holding cell with a powerful nero toxin? hehehehe." wesker presses the button and the windows and doors are sealed so no gas reaches the outside of the cell.

Kefka begins to laugh "HAHAHAHAH! neuro toxins are great! they cause serious pain."

Goku ran up to Yugi and Vivec and did his teleportation to just outside the cell. "You two run, I will get the others!"

Yugi was teleported outside and the magicians spirits returned to the cards. At Goku's command he started to run and motioned for Vivec to follow.

wesker sneers as he see's the captive vanish from the cell. "no matter, they are only delaying the inevitable." wesker turns to the computer panel and presses another button shutting off the neuro toxin from pumping into the room. after a minuet of thinking wesker smiles "i hope all the workers in this plant arent needed..... for i have a greater task in mind for them." Wesker picks up a suitcase he brought with him and walks out of the observation room.

Kefka has a confused look "Where did they go? they must have breathed in at least a small amount of the toxin right... RIGHT!?" he says turning to wesker before seeing that he left. "This..... wont....do...... i though we had this all planned out...... now that they escaped this all just got alot harder...... clinging to life when they know there going to die anyway." Kefka begins to pace. "i dont understand them, thinking they will escape fate, why not embrace it sooner rather then later?"
He stops pacing. "we have to stop them before they escape!"

Suddenly, a giant fist erupts from the floor beneath Kefka, grabbing him and dragging him down. "Ah, the mage that summoned that pitiful beast. Such flames cannot harm me or my kin!" boomed the Dire Frost Atronach. "Your attempts are pitiful, creature!"

((im sorry but im calling god mod, ifrit would so be able to melt him, its hellfire. and two can play this game :P)

"im gonna wipe your arrogance of the face of this planet and your realm when im done with you, you will be NOTHING!" a ball of light appears in kefka's hand "light of judgement." the light washes over the top half of the ice beast melting away the top half completely and destorying him so he cant return to his realm. kefka floats up and out of the ground he was dragged into.