This card seems a little bit too busy to me. It has
a lot of abilities. I think they're cool abilities, generally speaking, but I think this card would be better split into two creatures (and drop the protection from red/blue.)
Burning Twinmage


Creature – Wizard
2/2

,

, Discard a red card: Burning Twinmage deals 2 damage to target creature.
Thoughtbound Twinmage


Creature – Wizard
2/2

,

, Discard a blue card: Counter target spell unless its controller pays

.