Kurith, Prowling Kami

Flying, trample
Kurith, Prowling Kami can't attack or block unless you pay {5} each time. This cost is reduced by {1} for each +1/+1 counter on Kurith, Prowling Kami.
Whenever a creature you control fights, put a +1/+1 counter on Kurith, Prowling Kami. If that creature was legendary, instead put three +1/+1 counters on Kurith, Prowling Kami.