U-Ofojido, Sculpted Samurai

Vigilance
Indomitable {8}{r/w} (At the beginning of your upkeep,
you may pay {8}{r/w}. If you do, remove the words in
square brackets until end of turn.)
Whenever a [samurai or warrior] creature you
control attacks [alone], you may search your
library for an artifact or creature card, reveal it,
put it into your hand, then shuffle.