Ah Li, Little Rice Ball

{t} Target creature you don't control will help to
block damage dealt from a source. The same
creature may not block itself.
If that creature survives the damage, that
creature's controller may exile the top card of
your library face down. That creature's
controller may look at and cast that card for as
long as it remains exiled, and may spend mana
as though it were mana of any type to cast that
spell.