Seebo, the Swift

{g}{g}{t}: Seebo gets double strike until end of turn
Whenever Seebo the is target of a spell or ability
an opponent controls roll 1d6 and add Seebo's
power. If the number is greater than the CMC, counter the spell or ability. If the number is
double the CMC of the spell or ability, copy it.
You may choose new targets for the spell or ability
Artificers Lore (artifact spells you cast cost 1 less
to cast)