Kazuya, Honored Samurai

Kazuya has bushido X, where X is the number
of attacking or blocking creatures with bushido.
Whenever a creature with bushido kills a
creature, put a blood counter on Kazuya. If
Kazuya has five or more blood counters on it, it
has flying, trample, is a Demon in addition to
other types, and "When a creature you control
with bushido deals combat damage to a player,
that player sacrifices a creature."