A friend of mine runs a Brotherhood Deck and suggested to me these cards in whatever quatities you choose to run them in. This is just one Brotherhood type deck. There are others, but this is a decent start, to say the least. I'll save you the trouble of looking them up.
CHARACTERS
Thornn, Feral Hunter MSM-121
Character, Brotherhood, 1
1 ATK/1 DEF
Discard a card from your hand
è Thornn gets +2 ATK this attack. Use this power only once per turn.
Mastermind, Jason Wyngarde MOR-083
Character, Brotherhood, 1
1 ATK/1 DEF
Activate
èTarget character with a cost of 3 or less attacking Mastermind does not ready during the recovery phase this turn.
Destiny, Irene Adler MOR-078
Character, Brotherhood, 1
0 ATK/2 DEF
Activate èWhenever target character becomes stunned this turn, its controller loses 4endurance. Use this power only during the build phase.
Scarlet Witch, Eldritch Enchantress MMK-195
Character, Brotherhood, 2
2 ATK/ 2 DEF
When Scarlet Witch comes into play, you may have target opponent lose 1 endurance for each other Brotherhood character you control. If you do, return Scarlet Witch to her owner's hand.
Toad, Mortimer Toynbee MOR-095
Character, Brotherhood, 2
3 ATK/2 DEF
If Toad would become stunned, you may return him to his owner's hand instead
Pyro, St. John Allerdyce MOR-087
Character, Brotherhood, 2
2 ATK/2 DEF
Range
Activate
èTarget player loses 3 endurance.
Mystique, Raven Darkholme MOR-084
Character, Brotherhood, 3
4 ATK/3 DEF
If Mystique would cause breakthrough endurance loss to an opponent, that opponent loses 5 endurance instead.
Rogue, Anna Raven MOR-090
Character, Brotherhood, 3
4 ATK/4 DEF
Flight
Whenever Rogue attacks a character, exhaust that character
Sabretooth, Feral Rage MOR-091
Character, Brotherhood, 4
11 ATK/7 DEF
As an additional cost to recruit Sabretooth, discard a Brotherhood character card from your hand.
Quicksilver, Speed Demon MOR-089
Character, Brotherhood, 5
8 ATK/8 DEF
Discard a Brotherhood character card from your hand
èReady Quicksilver. Use this power only once per turn.
Magneto, Eric Lehnsherr MOR-080
Character, Brotherhood, 5
9 ATK/9 DEF
Flight, Range
At the start of your attack step, if you control another Brotherhood character, you may exhaust target character with a cost of 4 or less.
LOCATIONS
Avalon Space Station MOR-098
Location, 2
Activate, discard a card from your hand
èReturn target character card from your KO'd pile to your hand.
Activate, discard a Brotherhood character card from your hand
èReturn two target character cards from your KO'd pile to your hand.
Savage Land MOR-103
Location, 1
Activate
èTarget Brotherhood attacker you control gets +1 ATK and -1 DEF this attack for each resource you control.
Lost City MOR-101
Location, 1
If a Brotherhood character you control would become powered-up, that character gets +3 ATK and +3 DEF this attack instead.
Genosha
Location, 4
Activate, KO Genosha
èDraw two cards. If you control Magneto, draw four cards instead.
PLOT TWISTS
Savage Beatdown
Plot Twist, 4
Target attacker gets +5 ATK this attack.
Flying Kick
Plot Twist, 1
Target character has flight this turn.
While attacking this turn, that character gets +3 ATK.
Mega-Blast
Plot Twist, 1
Target support row character has range this turn. While attacking this turn, that character gets +4 ATK.