Its perfect for any R/x reanimator deck, a deck that casts from different zones, or a deck that uses triggers like persist
Order of Leitbur (T1, Ext, S) See Order of the White Shield
What makes the Shuriken so good is the massive power boost you could feasibly get off of it
what now
Rules 11/17/17 If a creature you control would enter the battlefield with a number of +1/+1 counters on it, it enters with twice that many instead
Still, once it resolves, you can choose how to kill your opponent slowly by either casting spells from the top of their library without paying mana, shrinking their hand, killing their creatures, and, if they've survived long enough, exiling all their non-land permanents with the ultimate