Demon Wind Shuriken

{t}: Place a +3/+0 counter on one creature of your choosing
{w}{w},{t}: Place down two 2/2 shadow clones with sneak (for 3 turns played at your choosing, that creature gains a +1/+0 ).
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The Demon Wind Shuriken is a four-bladed shuriken possessing pre-eminent lethality.