Aristo staff hint:
Wait until the black robed goblin appears, then get close to him and kill him with SRSR. The damage that he receives is minimal and it will take awhile. Once you kill him, the ice effect will make black robed goblin talk slower. When he says “Whys”, immediately grab his staff.

Steam achievements:
ACHIEVEMENT – HOW TO UNLOCK
“Oh gravity, thou art a heartless bitch” – Die from falling damage.
101st Airborne – Jump off a cliff and save yourself by teleporting.
88mph – Get thrown back in time by Vlad.
An eye for an eye – Defeat behold, the watcher
Bad Taste – Overkill 1000 enemies.
Basic Element – Use all basic elements at least once.
Better you than me – Be invisible while one other player dies.
Blue… No Yelloooow! – Have a hard time settling on a color.
Cooking by the book – Cast a Magick successfully.
Deep Impact – Kill 5 enemies with a single Earth projectile.
Don’t fear the reaper – Defeat death.
Dragon “Slayer” – Defeat fafnir.
Finders keepers – Steal your friends equipment after he has died.
First Blood – Kill one enemy using the M60.
Houdini – Break free from entanglement without using spells or magicks.
I call it a Hawking Hole – Make 50 enemies get sucked into the same Vortex.
I put on my robe and wizard hat – Aquire all Magicks in adventure mode.
I think Magicka is a pretty cool guy – Defeat assatur.
I’m the wizard king, I can do anything! – Create a spell that contains 5 different elements.
Imma Firin’ Mah Lazer!!!! – Successfully cross two beams into a more powerful one.
It’s over nine thousand!!!! – Deal over 9000 damage to one enemy.
It’s raining (beast)men – Gib 5 beastmen in 5 seconds.
Khaaaaaaaan! – Defeat khan
Killing your friends, you’re doing it wrong – Heal a total of 100 000 hit points.
King’s Quest – Find all the moose.
Let off some steam – Create a spell containing Steam.
Mission improbable – Complete Adventure in less than 4 hours.
More like the Aristocats – Defeat the Aristocrats.
Mu-mu-mu-multikill! – Kill 20 enemies with one spell or magick.
Never cross the beams – Cross opposite beams so that at least someone dies from it.
No more trolling – Defeat ygg.
OMG! They killed Yellow! – Die with yellow robes.
One in a million? – Get struck by a thunderbolt and survive.
Play it again, Vlad – Defeat vlad.
RPG much? – Complete all side quests in the game.
Saved by the king – Defeat the Warlock and Machine.
Sherlock Holmes – Find all secret areas in the game.
Solid Snake – Defeat jormungandr.
State Alchemist – Create a spell that contains at least 3 different elements.
Stuff of legends – Defeat Fafnir by striking him with Gram.
The Enchanter – Imbue your weapon with a spell.
The perfect storm – All players survived a thunderstorm.
There can be only one – Kill macleod.
There is no goat level – Defeat jotunn.
This is Magicka! – Push the soldier in battlefield down the hole.
Too fancy for fireballs? – Complete one level using only magicks.
Vanilla Ice – Create a spell containing only Ice.
We are the champions – Survive all waves of a challenge.
Wingardium Leviosa – Push someone off a cliff.