Piotr Rasputin grew up on a farm in Russia until Professor Xavier recruited him to join the X-Men. He is a loyal teammate, using his powerful armored form to protect his comrades in battle. His great physical strength conceals his quiet soul as an artist.Marvel Source
Piotr has an on-again, off-again romantic relationship with fellow X-Man Kitty Pryde. His sister, Illyana Rasputin, is the mutant sorceress known as Magik.
first ill explain the artifacts the amulet is for when u do get in those tough moments of oh crap you would be suprised how the dmg reduction helps in a pinch otherwise the artifact is mainly used for its +1 to all skills including full cosmics, medal ect i get +7 to all skills not including the + skills from affixes on the cosmics example being +1 to all collosus's muntant powerhouse powers. now the other artifact although on here is a low lvl useless one since the patch u can get lvl 60 versions from super heroic mode wich inc melee dmg by 900 on mine and health regen by 5k.
the choice behind the relic should be obvious since it boosts all of his attack skills
now for why i chose the powers that i did
deflective armor is actualy ur main spirit regen ability wich is what i use it for and the high skill lvl is just to inc its chance to proc wich makes for spaming crushing smite or spinning fists last longer
i chose osmium punch and osmium skin bc ive found that in end game t4 reds and in super heroic story mode u need to regen ur armor rating as fast as possible bc even with good cosmic gear u can take quite alot of dmg very quickly and ive found using osmium punch mixed in with smite spam or spinning fist will keep u topped off. I have tried alot of different collosus builds and i like this one bc it has quite alot of dmg and survivability.