Ibuki, Elusive Ninja

{2}{g}: Ibuki, Elusive Ninja gains +1/+1 and
hexproof until end of turn.
Whenever Ibuki, Elusive Ninja attacks or blocks,
you may tap any number of artifacts you control.
For each artifact tapped in this way, target
creature an opponent controls gains -1/-0 until
end of turn.
"Compete with your speed? A Ninja need not worry
about the likes of you!"