Magneto for 187 points
Wolverine for 60 points
Mystique for 52 points
=299 points

*All of these are Uniques from Armor Wars*

This is a really cool team with the keyword mutant, since there isn't one for House of M...but I think Mutant is the intended House of M Keyword since it's on the Spidey Unique (who you replace Magneto with for 184 points in a 200 game or add to the 299 point team for 371 to keep your keyword bonus and theme...then just add feats). Spidey is also Celebrity and a Unique from the same set

The team works well together because Wolverine and Mystique are useful for their very few points and the Magneto can single handedly destroy most teams/figures (MOST NOT ALL). Especially if you use the SHIELD TA to add 2 damage to him and then use his running to deal out a whopping 7 damage with move and attack! (Carrying a Wolverine to protect you with Blades/Claws or a Mystique back into Stealth)

That's pretty much how you use the team...
Mystique stays in Stealth and takes shots with Psychic Blast.
Wolverine takes shots (just cause he's a Wolvy with Range ) but mainly uses his willpower with Blades/Claws until he Regenerates.
Magneto runs around killing everything while carrying a character. When he's the only one who will be able to attack a target he takes full advantage of the SHIELD TA (as mentioned above)

that's my team, it's pretty cool I think for a theme team with keyword. ESPECIALLY such a perfect theme team for HOUSE OF M...the most perfect possible I'm proud to say. Especially because Mystique and Wolverine work together under Magneto's rule in House of M before Wolverine realizes what's going on and get's that little girl to make everyone else realize and blah, blah, blah...good book