Flame-Fist Duelist

Ninjutsu {r}{g} ({r}{g}, Return an unblocked
attacker you control to hand: Put this card onto
the battlefield from your hand tapped and
attacking.)
When Flame-Fist Duelist enters the
battlefield from your hand, if it's attacking,
you may pay {1} any number of times. For
each time that cost was paid, put a counter
your choice from among first strike, reach,
or +1/+1 onto Flame-Fist Duelist.