Master Arcanists' Duel

When any player casts a non-creature non-
planeswalker spell, they may choose a target
wizard that they control of the same color as
that spell. Reduce the cost of casting the spell
by {x} where X is the number of colored
mana of the same color as the cast spell in
the chosen wizard's mana cost.
All wizards have {1}{t} This creature has
Hexproof until the end of the turn