First, what is momentum?
Charger says "The damage caused by the Sapphire Charger can not be reduced,
SHIELDS ARE IGNORED."
Momentum says "The target creature
IGNORES SHIELD EFFECTS and gains +1|+1"
Then why momentumed psion's damage is reflected by the shield?
Second, Momentum's concept is ignoring any bad effect from shield, and Quint's concept is ignoring any targetting.
So Momentumed + Quinted creatures shouldn't be CCed from anything.
Then suddenly there was SoW.
So Momentumed + Quinted creature? Let's SoW + Reflective shield! Let them attack their own master!
Seriously, WTF? Are you kidding me?
Momentumed spell damage shouldn't be reflected.